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Finding the Fourth Proportional to 927.55, 1,279.47 and 578.17

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Solution

The fourth proportional to 927.55, 1,279.47 and 578.17 is: 797.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.55 : 1,279.47 = 578.17 : x
  2. Step 2: Convert to fraction form
    927.55/1,279.47 = 578.17/x
  3. Step 3: Cross multiply
    927.55x = 1,279.47 × 578.17
  4. Step 4: Simplify right side
    927.55x = 739,751.17
  5. Step 5: Solve for x
    x = 739,751.17/927.55
  6. Step 6: Final answer
    x = 797.53

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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.