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Finding the Fourth Proportional to 579,410.55, 869,115.83 and 491,930.55

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Solution

The fourth proportional to 579,410.55, 869,115.83 and 491,930.55 is: 737,895.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,410.55 : 869,115.83 = 491,930.55 : x
  2. Step 2: Convert to fraction form
    579,410.55/869,115.83 = 491,930.55/x
  3. Step 3: Cross multiply
    579,410.55x = 869,115.83 × 491,930.55
  4. Step 4: Simplify right side
    579,410.55x = 427,544,625,805.95
  5. Step 5: Solve for x
    x = 427,544,625,805.95/579,410.55
  6. Step 6: Final answer
    x = 737,895.83

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Double scale
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Similar ratio
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1.5x scale

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.