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Finding the Fourth Proportional to 609,904.60, 915,375.30 and 491,709.40

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Solution

The fourth proportional to 609,904.60, 915,375.30 and 491,709.40 is: 737,982.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,904.60 : 915,375.30 = 491,709.40 : x
  2. Step 2: Convert to fraction form
    609,904.60/915,375.30 = 491,709.40/x
  3. Step 3: Cross multiply
    609,904.60x = 915,375.30 × 491,709.40
  4. Step 4: Simplify right side
    609,904.60x = 450,098,639,537.82
  5. Step 5: Solve for x
    x = 450,098,639,537.82/609,904.60
  6. Step 6: Final answer
    x = 737,982.04

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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.