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Finding the Fourth Proportional to 927.49, 1,279.90 and 534.49

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Solution

The fourth proportional to 927.49, 1,279.90 and 534.49 is: 737.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.49 : 1,279.90 = 534.49 : x
  2. Step 2: Convert to fraction form
    927.49/1,279.90 = 534.49/x
  3. Step 3: Cross multiply
    927.49x = 1,279.90 × 534.49
  4. Step 4: Simplify right side
    927.49x = 684,093.75
  5. Step 5: Solve for x
    x = 684,093.75/927.49
  6. Step 6: Final answer
    x = 737.58

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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.