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Finding the Fourth Proportional to 318,298.97, 477,448.56 and 81,641.66

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Solution

The fourth proportional to 318,298.97, 477,448.56 and 81,641.66 is: 122,462.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,298.97 : 477,448.56 = 81,641.66 : x
  2. Step 2: Convert to fraction form
    318,298.97/477,448.56 = 81,641.66/x
  3. Step 3: Cross multiply
    318,298.97x = 477,448.56 × 81,641.66
  4. Step 4: Simplify right side
    318,298.97x = 38,979,690,615.77
  5. Step 5: Solve for x
    x = 38,979,690,615.77/318,298.97
  6. Step 6: Final answer
    x = 122,462.51

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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.