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Finding the Fourth Proportional to 354,321.42, 531,479.88 and 129,697.50

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Solution

The fourth proportional to 354,321.42, 531,479.88 and 129,697.50 is: 194,545.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,321.42 : 531,479.88 = 129,697.50 : x
  2. Step 2: Convert to fraction form
    354,321.42/531,479.88 = 129,697.50/x
  3. Step 3: Cross multiply
    354,321.42x = 531,479.88 × 129,697.50
  4. Step 4: Simplify right side
    354,321.42x = 68,931,611,736.30
  5. Step 5: Solve for x
    x = 68,931,611,736.30/354,321.42
  6. Step 6: Final answer
    x = 194,545.43

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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.