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Finding the Fourth Proportional to 399,119.68, 550,790.24 and 235,781.52

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Solution

The fourth proportional to 399,119.68, 550,790.24 and 235,781.52 is: 325,381.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,119.68 : 550,790.24 = 235,781.52 : x
  2. Step 2: Convert to fraction form
    399,119.68/550,790.24 = 235,781.52/x
  3. Step 3: Cross multiply
    399,119.68x = 550,790.24 × 235,781.52
  4. Step 4: Simplify right side
    399,119.68x = 129,866,159,988.37
  5. Step 5: Solve for x
    x = 129,866,159,988.37/399,119.68
  6. Step 6: Final answer
    x = 325,381.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.