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Finding the Fourth Proportional to 636,695.64, 878,522.76 and 378,658.80

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Solution

The fourth proportional to 636,695.64, 878,522.76 and 378,658.80 is: 522,479.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,695.64 : 878,522.76 = 378,658.80 : x
  2. Step 2: Convert to fraction form
    636,695.64/878,522.76 = 378,658.80/x
  3. Step 3: Cross multiply
    636,695.64x = 878,522.76 × 378,658.80
  4. Step 4: Simplify right side
    636,695.64x = 332,660,374,074.29
  5. Step 5: Solve for x
    x = 332,660,374,074.29/636,695.64
  6. Step 6: Final answer
    x = 522,479.43

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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.