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Finding the Fourth Proportional to 390,901.68, 586,448.04 and 124,662.24

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Solution

The fourth proportional to 390,901.68, 586,448.04 and 124,662.24 is: 187,023.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,901.68 : 586,448.04 = 124,662.24 : x
  2. Step 2: Convert to fraction form
    390,901.68/586,448.04 = 124,662.24/x
  3. Step 3: Cross multiply
    390,901.68x = 586,448.04 × 124,662.24
  4. Step 4: Simplify right side
    390,901.68x = 73,107,926,310.01
  5. Step 5: Solve for x
    x = 73,107,926,310.01/390,901.68
  6. Step 6: Final answer
    x = 187,023.82

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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.