Home / 728,261.86-1,005,098.74-418,286.39

Finding the Fourth Proportional to 728,261.86, 1,005,098.74 and 418,286.39

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Solution

The fourth proportional to 728,261.86, 1,005,098.74 and 418,286.39 is: 577,291.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,261.86 : 1,005,098.74 = 418,286.39 : x
  2. Step 2: Convert to fraction form
    728,261.86/1,005,098.74 = 418,286.39/x
  3. Step 3: Cross multiply
    728,261.86x = 1,005,098.74 × 418,286.39
  4. Step 4: Simplify right side
    728,261.86x = 420,419,123,548.15
  5. Step 5: Solve for x
    x = 420,419,123,548.15/728,261.86
  6. Step 6: Final answer
    x = 577,291.15

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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.