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Finding the Fourth Proportional to 872,648.78, 1,204,239.30 and 485,462.30

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Solution

The fourth proportional to 872,648.78, 1,204,239.30 and 485,462.30 is: 669,929.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,648.78 : 1,204,239.30 = 485,462.30 : x
  2. Step 2: Convert to fraction form
    872,648.78/1,204,239.30 = 485,462.30/x
  3. Step 3: Cross multiply
    872,648.78x = 1,204,239.30 × 485,462.30
  4. Step 4: Simplify right side
    872,648.78x = 584,612,780,328.39
  5. Step 5: Solve for x
    x = 584,612,780,328.39/872,648.78
  6. Step 6: Final answer
    x = 669,929.06

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.