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Finding the Fourth Proportional to 974.02, 1,343.91 and 625.18

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Solution

The fourth proportional to 974.02, 1,343.91 and 625.18 is: 862.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.02 : 1,343.91 = 625.18 : x
  2. Step 2: Convert to fraction form
    974.02/1,343.91 = 625.18/x
  3. Step 3: Cross multiply
    974.02x = 1,343.91 × 625.18
  4. Step 4: Simplify right side
    974.02x = 840,185.65
  5. Step 5: Solve for x
    x = 840,185.65/974.02
  6. Step 6: Final answer
    x = 862.60

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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.