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Finding the Fourth Proportional to 519,815.80, 779,723.70 and 488,711.80

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Solution

The fourth proportional to 519,815.80, 779,723.70 and 488,711.80 is: 733,067.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,815.80 : 779,723.70 = 488,711.80 : x
  2. Step 2: Convert to fraction form
    519,815.80/779,723.70 = 488,711.80/x
  3. Step 3: Cross multiply
    519,815.80x = 779,723.70 × 488,711.80
  4. Step 4: Simplify right side
    519,815.80x = 381,060,172,929.66
  5. Step 5: Solve for x
    x = 381,060,172,929.66/519,815.80
  6. Step 6: Final answer
    x = 733,067.70

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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.