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Finding the Fourth Proportional to 636,258.68, 878,053.74 and 349,785.98

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Solution

The fourth proportional to 636,258.68, 878,053.74 and 349,785.98 is: 482,713.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,258.68 : 878,053.74 = 349,785.98 : x
  2. Step 2: Convert to fraction form
    636,258.68/878,053.74 = 349,785.98/x
  3. Step 3: Cross multiply
    636,258.68x = 878,053.74 × 349,785.98
  4. Step 4: Simplify right side
    636,258.68x = 307,130,887,938.57
  5. Step 5: Solve for x
    x = 307,130,887,938.57/636,258.68
  6. Step 6: Final answer
    x = 482,713.87

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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.