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Finding the Fourth Proportional to 925.22, 1,275.75 and 629.98

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Solution

The fourth proportional to 925.22, 1,275.75 and 629.98 is: 868.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.22 : 1,275.75 = 629.98 : x
  2. Step 2: Convert to fraction form
    925.22/1,275.75 = 629.98/x
  3. Step 3: Cross multiply
    925.22x = 1,275.75 × 629.98
  4. Step 4: Simplify right side
    925.22x = 803,693.80
  5. Step 5: Solve for x
    x = 803,693.80/925.22
  6. Step 6: Final answer
    x = 868.65

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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.