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Finding the Fourth Proportional to 636,375.28, 878,175.40 and 349,893.16

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Solution

The fourth proportional to 636,375.28, 878,175.40 and 349,893.16 is: 482,840.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,375.28 : 878,175.40 = 349,893.16 : x
  2. Step 2: Convert to fraction form
    636,375.28/878,175.40 = 349,893.16/x
  3. Step 3: Cross multiply
    636,375.28x = 878,175.40 × 349,893.16
  4. Step 4: Simplify right side
    636,375.28x = 307,267,565,740.26
  5. Step 5: Solve for x
    x = 307,267,565,740.26/636,375.28
  6. Step 6: Final answer
    x = 482,840.20

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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.