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Finding the Fourth Proportional to 885,797.10, 1,328,695.65 and 412,530.30

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Solution

The fourth proportional to 885,797.10, 1,328,695.65 and 412,530.30 is: 618,795.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,797.10 : 1,328,695.65 = 412,530.30 : x
  2. Step 2: Convert to fraction form
    885,797.10/1,328,695.65 = 412,530.30/x
  3. Step 3: Cross multiply
    885,797.10x = 1,328,695.65 × 412,530.30
  4. Step 4: Simplify right side
    885,797.10x = 548,127,215,103.20
  5. Step 5: Solve for x
    x = 548,127,215,103.20/885,797.10
  6. Step 6: Final answer
    x = 618,795.45

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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.