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Finding the Fourth Proportional to 782.52, 1,171.44 and 508.74

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Solution

The fourth proportional to 782.52, 1,171.44 and 508.74 is: 761.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.52 : 1,171.44 = 508.74 : x
  2. Step 2: Convert to fraction form
    782.52/1,171.44 = 508.74/x
  3. Step 3: Cross multiply
    782.52x = 1,171.44 × 508.74
  4. Step 4: Simplify right side
    782.52x = 595,958.39
  5. Step 5: Solve for x
    x = 595,958.39/782.52
  6. Step 6: Final answer
    x = 761.59

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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.