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Finding the Fourth Proportional to 406,528.53, 609,787.26 and 126,045.78

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Solution

The fourth proportional to 406,528.53, 609,787.26 and 126,045.78 is: 189,066.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,528.53 : 609,787.26 = 126,045.78 : x
  2. Step 2: Convert to fraction form
    406,528.53/609,787.26 = 126,045.78/x
  3. Step 3: Cross multiply
    406,528.53x = 609,787.26 × 126,045.78
  4. Step 4: Simplify right side
    406,528.53x = 76,861,110,820.76
  5. Step 5: Solve for x
    x = 76,861,110,820.76/406,528.53
  6. Step 6: Final answer
    x = 189,066.95

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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.