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Finding the Fourth Proportional to 510.67, 765.42 and 291.42

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Solution

The fourth proportional to 510.67, 765.42 and 291.42 is: 436.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.67 : 765.42 = 291.42 : x
  2. Step 2: Convert to fraction form
    510.67/765.42 = 291.42/x
  3. Step 3: Cross multiply
    510.67x = 765.42 × 291.42
  4. Step 4: Simplify right side
    510.67x = 223,057.60
  5. Step 5: Solve for x
    x = 223,057.60/510.67
  6. Step 6: Final answer
    x = 436.79

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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.