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Finding the Fourth Proportional to 390,833.87, 586,293.28 and 124,531.79

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Solution

The fourth proportional to 390,833.87, 586,293.28 and 124,531.79 is: 186,811.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,833.87 : 586,293.28 = 124,531.79 : x
  2. Step 2: Convert to fraction form
    390,833.87/586,293.28 = 124,531.79/x
  3. Step 3: Cross multiply
    390,833.87x = 586,293.28 × 124,531.79
  4. Step 4: Simplify right side
    390,833.87x = 73,012,148,691.90
  5. Step 5: Solve for x
    x = 73,012,148,691.90/390,833.87
  6. Step 6: Final answer
    x = 186,811.21

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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.