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Finding the Fourth Proportional to 658,680.31, 908,978.93 and 356,874.31

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Solution

The fourth proportional to 658,680.31, 908,978.93 and 356,874.31 is: 492,486.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,680.31 : 908,978.93 = 356,874.31 : x
  2. Step 2: Convert to fraction form
    658,680.31/908,978.93 = 356,874.31/x
  3. Step 3: Cross multiply
    658,680.31x = 908,978.93 × 356,874.31
  4. Step 4: Simplify right side
    658,680.31x = 324,391,226,663.92
  5. Step 5: Solve for x
    x = 324,391,226,663.92/658,680.31
  6. Step 6: Final answer
    x = 492,486.60

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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.