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Finding the Fourth Proportional to 636,258.43, 878,053.40 and 349,785.73

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Solution

The fourth proportional to 636,258.43, 878,053.40 and 349,785.73 is: 482,713.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,258.43 : 878,053.40 = 349,785.73 : x
  2. Step 2: Convert to fraction form
    636,258.43/878,053.40 = 349,785.73/x
  3. Step 3: Cross multiply
    636,258.43x = 878,053.40 × 349,785.73
  4. Step 4: Simplify right side
    636,258.43x = 307,130,549,497.98
  5. Step 5: Solve for x
    x = 307,130,549,497.98/636,258.43
  6. Step 6: Final answer
    x = 482,713.52

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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.