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Finding the Fourth Proportional to 927.15, 1,279.61 and 568.46

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Solution

The fourth proportional to 927.15, 1,279.61 and 568.46 is: 784.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.15 : 1,279.61 = 568.46 : x
  2. Step 2: Convert to fraction form
    927.15/1,279.61 = 568.46/x
  3. Step 3: Cross multiply
    927.15x = 1,279.61 × 568.46
  4. Step 4: Simplify right side
    927.15x = 727,397.86
  5. Step 5: Solve for x
    x = 727,397.86/927.15
  6. Step 6: Final answer
    x = 784.55

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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.