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Finding the Fourth Proportional to 390,760.60, 586,134.50 and 124,517.48

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Solution

The fourth proportional to 390,760.60, 586,134.50 and 124,517.48 is: 186,774.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,760.60 : 586,134.50 = 124,517.48 : x
  2. Step 2: Convert to fraction form
    390,760.60/586,134.50 = 124,517.48/x
  3. Step 3: Cross multiply
    390,760.60x = 586,134.50 × 124,517.48
  4. Step 4: Simplify right side
    390,760.60x = 72,983,990,881.06
  5. Step 5: Solve for x
    x = 72,983,990,881.06/390,760.60
  6. Step 6: Final answer
    x = 186,774.18

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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.