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Finding the Fourth Proportional to 390,759.26, 586,132.42 and 124,516.16

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Solution

The fourth proportional to 390,759.26, 586,132.42 and 124,516.16 is: 186,772.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,759.26 : 586,132.42 = 124,516.16 : x
  2. Step 2: Convert to fraction form
    390,759.26/586,132.42 = 124,516.16/x
  3. Step 3: Cross multiply
    390,759.26x = 586,132.42 × 124,516.16
  4. Step 4: Simplify right side
    390,759.26x = 72,982,958,189.91
  5. Step 5: Solve for x
    x = 72,982,958,189.91/390,759.26
  6. Step 6: Final answer
    x = 186,772.18

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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.