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Finding the Fourth Proportional to 510.55, 765.72 and 250.43

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Solution

The fourth proportional to 510.55, 765.72 and 250.43 is: 375.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.55 : 765.72 = 250.43 : x
  2. Step 2: Convert to fraction form
    510.55/765.72 = 250.43/x
  3. Step 3: Cross multiply
    510.55x = 765.72 × 250.43
  4. Step 4: Simplify right side
    510.55x = 191,761.67
  5. Step 5: Solve for x
    x = 191,761.67/510.55
  6. Step 6: Final answer
    x = 375.60

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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.