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Finding the Fourth Proportional to 925.56, 1,278.72 and 876.96

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Solution

The fourth proportional to 925.56, 1,278.72 and 876.96 is: 1,211.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.56 : 1,278.72 = 876.96 : x
  2. Step 2: Convert to fraction form
    925.56/1,278.72 = 876.96/x
  3. Step 3: Cross multiply
    925.56x = 1,278.72 × 876.96
  4. Step 4: Simplify right side
    925.56x = 1,121,386.29
  5. Step 5: Solve for x
    x = 1,121,386.29/925.56
  6. Step 6: Final answer
    x = 1,211.58

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1.5x scale

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.