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Finding the Fourth Proportional to 317,486.40, 476,134.56 and 127,885.92

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Solution

The fourth proportional to 317,486.40, 476,134.56 and 127,885.92 is: 191,790.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,486.40 : 476,134.56 = 127,885.92 : x
  2. Step 2: Convert to fraction form
    317,486.40/476,134.56 = 127,885.92/x
  3. Step 3: Cross multiply
    317,486.40x = 476,134.56 × 127,885.92
  4. Step 4: Simplify right side
    317,486.40x = 60,890,906,249.40
  5. Step 5: Solve for x
    x = 60,890,906,249.40/317,486.40
  6. Step 6: Final answer
    x = 191,790.60

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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.