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Finding the Fourth Proportional to 390,751.24, 586,120.45 and 124,508.15

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Solution

The fourth proportional to 390,751.24, 586,120.45 and 124,508.15 is: 186,760.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,751.24 : 586,120.45 = 124,508.15 : x
  2. Step 2: Convert to fraction form
    390,751.24/586,120.45 = 124,508.15/x
  3. Step 3: Cross multiply
    390,751.24x = 586,120.45 × 124,508.15
  4. Step 4: Simplify right side
    390,751.24x = 72,976,772,906.67
  5. Step 5: Solve for x
    x = 72,976,772,906.67/390,751.24
  6. Step 6: Final answer
    x = 186,760.18

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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.