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Finding the Fourth Proportional to 997.44, 1,374.44 and 928.24

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Solution

The fourth proportional to 997.44, 1,374.44 and 928.24 is: 1,279.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.44 : 1,374.44 = 928.24 : x
  2. Step 2: Convert to fraction form
    997.44/1,374.44 = 928.24/x
  3. Step 3: Cross multiply
    997.44x = 1,374.44 × 928.24
  4. Step 4: Simplify right side
    997.44x = 1,275,810.19
  5. Step 5: Solve for x
    x = 1,275,810.19/997.44
  6. Step 6: Final answer
    x = 1,279.08

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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.