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Finding the Fourth Proportional to 510.28, 763.74 and 387.87

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Solution

The fourth proportional to 510.28, 763.74 and 387.87 is: 580.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.28 : 763.74 = 387.87 : x
  2. Step 2: Convert to fraction form
    510.28/763.74 = 387.87/x
  3. Step 3: Cross multiply
    510.28x = 763.74 × 387.87
  4. Step 4: Simplify right side
    510.28x = 296,228.02
  5. Step 5: Solve for x
    x = 296,228.02/510.28
  6. Step 6: Final answer
    x = 580.52

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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.