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Finding the Fourth Proportional to 415,155.92, 572,921.52 and 245,405.84

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Solution

The fourth proportional to 415,155.92, 572,921.52 and 245,405.84 is: 338,663.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,155.92 : 572,921.52 = 245,405.84 : x
  2. Step 2: Convert to fraction form
    415,155.92/572,921.52 = 245,405.84/x
  3. Step 3: Cross multiply
    415,155.92x = 572,921.52 × 245,405.84
  4. Step 4: Simplify right side
    415,155.92x = 140,598,286,869.68
  5. Step 5: Solve for x
    x = 140,598,286,869.68/415,155.92
  6. Step 6: Final answer
    x = 338,663.81

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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.