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Finding the Fourth Proportional to 974.76, 1,344.78 and 625.44

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Solution

The fourth proportional to 974.76, 1,344.78 and 625.44 is: 862.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.76 : 1,344.78 = 625.44 : x
  2. Step 2: Convert to fraction form
    974.76/1,344.78 = 625.44/x
  3. Step 3: Cross multiply
    974.76x = 1,344.78 × 625.44
  4. Step 4: Simplify right side
    974.76x = 841,079.20
  5. Step 5: Solve for x
    x = 841,079.20/974.76
  6. Step 6: Final answer
    x = 862.86

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1.5x scale

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.