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Finding the Fourth Proportional to 390,753.24, 586,123.45 and 124,510.15

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Solution

The fourth proportional to 390,753.24, 586,123.45 and 124,510.15 is: 186,763.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,753.24 : 586,123.45 = 124,510.15 : x
  2. Step 2: Convert to fraction form
    390,753.24/586,123.45 = 124,510.15/x
  3. Step 3: Cross multiply
    390,753.24x = 586,123.45 × 124,510.15
  4. Step 4: Simplify right side
    390,753.24x = 72,978,318,678.02
  5. Step 5: Solve for x
    x = 72,978,318,678.02/390,753.24
  6. Step 6: Final answer
    x = 186,763.18

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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.