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Finding the Fourth Proportional to 974.44, 1,337.50 and 891.40

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Solution

The fourth proportional to 974.44, 1,337.50 and 891.40 is: 1,223.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.44 : 1,337.50 = 891.40 : x
  2. Step 2: Convert to fraction form
    974.44/1,337.50 = 891.40/x
  3. Step 3: Cross multiply
    974.44x = 1,337.50 × 891.40
  4. Step 4: Simplify right side
    974.44x = 1,192,247.50
  5. Step 5: Solve for x
    x = 1,192,247.50/974.44
  6. Step 6: Final answer
    x = 1,223.52

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.