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Finding the Fourth Proportional to 491,429.70, 737,144.55 and 391,046.40

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Solution

The fourth proportional to 491,429.70, 737,144.55 and 391,046.40 is: 586,569.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,429.70 : 737,144.55 = 391,046.40 : x
  2. Step 2: Convert to fraction form
    491,429.70/737,144.55 = 391,046.40/x
  3. Step 3: Cross multiply
    491,429.70x = 737,144.55 × 391,046.40
  4. Step 4: Simplify right side
    491,429.70x = 288,257,722,557.12
  5. Step 5: Solve for x
    x = 288,257,722,557.12/491,429.70
  6. Step 6: Final answer
    x = 586,569.60

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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.