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Finding the Fourth Proportional to 354,310.71, 531,310.24 and 129,612.86

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Solution

The fourth proportional to 354,310.71, 531,310.24 and 129,612.86 is: 194,362.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,310.71 : 531,310.24 = 129,612.86 : x
  2. Step 2: Convert to fraction form
    354,310.71/531,310.24 = 129,612.86/x
  3. Step 3: Cross multiply
    354,310.71x = 531,310.24 × 129,612.86
  4. Step 4: Simplify right side
    354,310.71x = 68,864,638,522.49
  5. Step 5: Solve for x
    x = 68,864,638,522.49/354,310.71
  6. Step 6: Final answer
    x = 194,362.29

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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.