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Finding the Fourth Proportional to 782.26, 1,079.48 and 502.52

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Solution

The fourth proportional to 782.26, 1,079.48 and 502.52 is: 693.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.26 : 1,079.48 = 502.52 : x
  2. Step 2: Convert to fraction form
    782.26/1,079.48 = 502.52/x
  3. Step 3: Cross multiply
    782.26x = 1,079.48 × 502.52
  4. Step 4: Simplify right side
    782.26x = 542,460.29
  5. Step 5: Solve for x
    x = 542,460.29/782.26
  6. Step 6: Final answer
    x = 693.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.