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Finding the Fourth Proportional to 631.71, 945.68 and 508.95

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Solution

The fourth proportional to 631.71, 945.68 and 508.95 is: 761.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.71 : 945.68 = 508.95 : x
  2. Step 2: Convert to fraction form
    631.71/945.68 = 508.95/x
  3. Step 3: Cross multiply
    631.71x = 945.68 × 508.95
  4. Step 4: Simplify right side
    631.71x = 481,301.29
  5. Step 5: Solve for x
    x = 481,301.29/631.71
  6. Step 6: Final answer
    x = 761.90

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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.