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Finding the Fourth Proportional to 390,645.12, 585,773.76 and 124,371

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Solution

The fourth proportional to 390,645.12, 585,773.76 and 124,371 is: 186,494.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,645.12 : 585,773.76 = 124,371 : x
  2. Step 2: Convert to fraction form
    390,645.12/585,773.76 = 124,371/x
  3. Step 3: Cross multiply
    390,645.12x = 585,773.76 × 124,371
  4. Step 4: Simplify right side
    390,645.12x = 72,853,268,304.96
  5. Step 5: Solve for x
    x = 72,853,268,304.96/390,645.12
  6. Step 6: Final answer
    x = 186,494.76

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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.