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Finding the Fourth Proportional to 508.30, 762.45 and 143.13

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Solution

The fourth proportional to 508.30, 762.45 and 143.13 is: 214.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.30 : 762.45 = 143.13 : x
  2. Step 2: Convert to fraction form
    508.30/762.45 = 143.13/x
  3. Step 3: Cross multiply
    508.30x = 762.45 × 143.13
  4. Step 4: Simplify right side
    508.30x = 109,129.47
  5. Step 5: Solve for x
    x = 109,129.47/508.30
  6. Step 6: Final answer
    x = 214.70

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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.