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Finding the Fourth Proportional to 925.26, 1,277.80 and 691.98

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Solution

The fourth proportional to 925.26, 1,277.80 and 691.98 is: 955.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.26 : 1,277.80 = 691.98 : x
  2. Step 2: Convert to fraction form
    925.26/1,277.80 = 691.98/x
  3. Step 3: Cross multiply
    925.26x = 1,277.80 × 691.98
  4. Step 4: Simplify right side
    925.26x = 884,212.04
  5. Step 5: Solve for x
    x = 884,212.04/925.26
  6. Step 6: Final answer
    x = 955.64

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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.