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Finding the Fourth Proportional to 508.71, 763.05 and 143.49

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Solution

The fourth proportional to 508.71, 763.05 and 143.49 is: 215.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.71 : 763.05 = 143.49 : x
  2. Step 2: Convert to fraction form
    508.71/763.05 = 143.49/x
  3. Step 3: Cross multiply
    508.71x = 763.05 × 143.49
  4. Step 4: Simplify right side
    508.71x = 109,490.04
  5. Step 5: Solve for x
    x = 109,490.04/508.71
  6. Step 6: Final answer
    x = 215.23

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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.