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Finding the Fourth Proportional to 658,125.72, 908,057.28 and 399,998.16

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Solution

The fourth proportional to 658,125.72, 908,057.28 and 399,998.16 is: 551,902.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,125.72 : 908,057.28 = 399,998.16 : x
  2. Step 2: Convert to fraction form
    658,125.72/908,057.28 = 399,998.16/x
  3. Step 3: Cross multiply
    658,125.72x = 908,057.28 × 399,998.16
  4. Step 4: Simplify right side
    658,125.72x = 363,221,241,174.61
  5. Step 5: Solve for x
    x = 363,221,241,174.61/658,125.72
  6. Step 6: Final answer
    x = 551,902.52

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.