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Finding the Fourth Proportional to 661,400.40, 992,489.40 and 240,718.80

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Solution

The fourth proportional to 661,400.40, 992,489.40 and 240,718.80 is: 361,219.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,400.40 : 992,489.40 = 240,718.80 : x
  2. Step 2: Convert to fraction form
    661,400.40/992,489.40 = 240,718.80/x
  3. Step 3: Cross multiply
    661,400.40x = 992,489.40 × 240,718.80
  4. Step 4: Simplify right side
    661,400.40x = 238,910,857,380.72
  5. Step 5: Solve for x
    x = 238,910,857,380.72/661,400.40
  6. Step 6: Final answer
    x = 361,219.71

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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.