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Finding the Fourth Proportional to 508.60, 762.82 and 143.31

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Solution

The fourth proportional to 508.60, 762.82 and 143.31 is: 214.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.60 : 762.82 = 143.31 : x
  2. Step 2: Convert to fraction form
    508.60/762.82 = 143.31/x
  3. Step 3: Cross multiply
    508.60x = 762.82 × 143.31
  4. Step 4: Simplify right side
    508.60x = 109,315.20
  5. Step 5: Solve for x
    x = 109,315.20/508.60
  6. Step 6: Final answer
    x = 214.93

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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.