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Finding the Fourth Proportional to 510.71, 764.64 and 437.60

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Solution

The fourth proportional to 510.71, 764.64 and 437.60 is: 655.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.71 : 764.64 = 437.60 : x
  2. Step 2: Convert to fraction form
    510.71/764.64 = 437.60/x
  3. Step 3: Cross multiply
    510.71x = 764.64 × 437.60
  4. Step 4: Simplify right side
    510.71x = 334,608.38
  5. Step 5: Solve for x
    x = 334,608.38/510.71
  6. Step 6: Final answer
    x = 655.19

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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.