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Finding the Fourth Proportional to 390,753.76, 586,124.18 and 124,510.66

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Solution

The fourth proportional to 390,753.76, 586,124.18 and 124,510.66 is: 186,763.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,753.76 : 586,124.18 = 124,510.66 : x
  2. Step 2: Convert to fraction form
    390,753.76/586,124.18 = 124,510.66/x
  3. Step 3: Cross multiply
    390,753.76x = 586,124.18 × 124,510.66
  4. Step 4: Simplify right side
    390,753.76x = 72,978,708,493.76
  5. Step 5: Solve for x
    x = 72,978,708,493.76/390,753.76
  6. Step 6: Final answer
    x = 186,763.93

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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.