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Finding the Fourth Proportional to 927.88, 1,279.23 and 769.93

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Solution

The fourth proportional to 927.88, 1,279.23 and 769.93 is: 1,061.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.88 : 1,279.23 = 769.93 : x
  2. Step 2: Convert to fraction form
    927.88/1,279.23 = 769.93/x
  3. Step 3: Cross multiply
    927.88x = 1,279.23 × 769.93
  4. Step 4: Simplify right side
    927.88x = 984,917.55
  5. Step 5: Solve for x
    x = 984,917.55/927.88
  6. Step 6: Final answer
    x = 1,061.47

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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.