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Finding the Fourth Proportional to 354,381.66, 531,416.52 and 129,683.70

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Solution

The fourth proportional to 354,381.66, 531,416.52 and 129,683.70 is: 194,468.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,381.66 : 531,416.52 = 129,683.70 : x
  2. Step 2: Convert to fraction form
    354,381.66/531,416.52 = 129,683.70/x
  3. Step 3: Cross multiply
    354,381.66x = 531,416.52 × 129,683.70
  4. Step 4: Simplify right side
    354,381.66x = 68,916,060,554.72
  5. Step 5: Solve for x
    x = 68,916,060,554.72/354,381.66
  6. Step 6: Final answer
    x = 194,468.47

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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.