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Finding the Fourth Proportional to 765.33, 1,148.93 and 505.55

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Solution

The fourth proportional to 765.33, 1,148.93 and 505.55 is: 758.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.33 : 1,148.93 = 505.55 : x
  2. Step 2: Convert to fraction form
    765.33/1,148.93 = 505.55/x
  3. Step 3: Cross multiply
    765.33x = 1,148.93 × 505.55
  4. Step 4: Simplify right side
    765.33x = 580,841.56
  5. Step 5: Solve for x
    x = 580,841.56/765.33
  6. Step 6: Final answer
    x = 758.94

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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.