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Finding the Fourth Proportional to 765.07, 1,147.87 and 303.17

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Solution

The fourth proportional to 765.07, 1,147.87 and 303.17 is: 454.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.07 : 1,147.87 = 303.17 : x
  2. Step 2: Convert to fraction form
    765.07/1,147.87 = 303.17/x
  3. Step 3: Cross multiply
    765.07x = 1,147.87 × 303.17
  4. Step 4: Simplify right side
    765.07x = 347,997.62
  5. Step 5: Solve for x
    x = 347,997.62/765.07
  6. Step 6: Final answer
    x = 454.86

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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.