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Finding the Fourth Proportional to 636,785.52, 878,046.52 and 491,260.08

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Solution

The fourth proportional to 636,785.52, 878,046.52 and 491,260.08 is: 677,385.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,785.52 : 878,046.52 = 491,260.08 : x
  2. Step 2: Convert to fraction form
    636,785.52/878,046.52 = 491,260.08/x
  3. Step 3: Cross multiply
    636,785.52x = 878,046.52 × 491,260.08
  4. Step 4: Simplify right side
    636,785.52x = 431,349,203,658.92
  5. Step 5: Solve for x
    x = 431,349,203,658.92/636,785.52
  6. Step 6: Final answer
    x = 677,385.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.