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Finding the Fourth Proportional to 510.60, 702.96 and 386.10

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Solution

The fourth proportional to 510.60, 702.96 and 386.10 is: 531.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.60 : 702.96 = 386.10 : x
  2. Step 2: Convert to fraction form
    510.60/702.96 = 386.10/x
  3. Step 3: Cross multiply
    510.60x = 702.96 × 386.10
  4. Step 4: Simplify right side
    510.60x = 271,412.86
  5. Step 5: Solve for x
    x = 271,412.86/510.60
  6. Step 6: Final answer
    x = 531.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.