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Finding the Fourth Proportional to 288,759.39, 433,200.90 and 86,371.38

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Solution

The fourth proportional to 288,759.39, 433,200.90 and 86,371.38 is: 129,575.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,759.39 : 433,200.90 = 86,371.38 : x
  2. Step 2: Convert to fraction form
    288,759.39/433,200.90 = 86,371.38/x
  3. Step 3: Cross multiply
    288,759.39x = 433,200.90 × 86,371.38
  4. Step 4: Simplify right side
    288,759.39x = 37,416,159,550.24
  5. Step 5: Solve for x
    x = 37,416,159,550.24/288,759.39
  6. Step 6: Final answer
    x = 129,575.56

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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.