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Finding the Fourth Proportional to 885,736,021.20, 1,328,604,031.80 and 838,384,628.10

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Solution

The fourth proportional to 885,736,021.20, 1,328,604,031.80 and 838,384,628.10 is: 1,257,576,942.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,736,021.20 : 1,328,604,031.80 = 838,384,628.10 : x
  2. Step 2: Convert to fraction form
    885,736,021.20/1,328,604,031.80 = 838,384,628.10/x
  3. Step 3: Cross multiply
    885,736,021.20x = 1,328,604,031.80 × 838,384,628.10
  4. Step 4: Simplify right side
    885,736,021.20x = 1,113,881,197,092,803,584
  5. Step 5: Solve for x
    x = 1,113,881,197,092,803,584/885,736,021.20
  6. Step 6: Final answer
    x = 1,257,576,942.15

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.