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Finding the Fourth Proportional to 606,721.70, 910,082.55 and 438,760.10

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Solution

The fourth proportional to 606,721.70, 910,082.55 and 438,760.10 is: 658,140.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,721.70 : 910,082.55 = 438,760.10 : x
  2. Step 2: Convert to fraction form
    606,721.70/910,082.55 = 438,760.10/x
  3. Step 3: Cross multiply
    606,721.70x = 910,082.55 × 438,760.10
  4. Step 4: Simplify right side
    606,721.70x = 399,307,910,646.26
  5. Step 5: Solve for x
    x = 399,307,910,646.26/606,721.70
  6. Step 6: Final answer
    x = 658,140.15

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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.