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Finding the Fourth Proportional to 506,988.10, 699,706.12 and 289,250.38

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Solution

The fourth proportional to 506,988.10, 699,706.12 and 289,250.38 is: 399,201.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    506,988.10 : 699,706.12 = 289,250.38 : x
  2. Step 2: Convert to fraction form
    506,988.10/699,706.12 = 289,250.38/x
  3. Step 3: Cross multiply
    506,988.10x = 699,706.12 × 289,250.38
  4. Step 4: Simplify right side
    506,988.10x = 202,390,261,098.33
  5. Step 5: Solve for x
    x = 202,390,261,098.33/506,988.10
  6. Step 6: Final answer
    x = 399,201.21

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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.