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Finding the Fourth Proportional to 438,414.92, 657,641.54 and 138,917.58

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Solution

The fourth proportional to 438,414.92, 657,641.54 and 138,917.58 is: 208,382.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,414.92 : 657,641.54 = 138,917.58 : x
  2. Step 2: Convert to fraction form
    438,414.92/657,641.54 = 138,917.58/x
  3. Step 3: Cross multiply
    438,414.92x = 657,641.54 × 138,917.58
  4. Step 4: Simplify right side
    438,414.92x = 91,357,971,244.27
  5. Step 5: Solve for x
    x = 91,357,971,244.27/438,414.92
  6. Step 6: Final answer
    x = 208,382.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.