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Finding the Fourth Proportional to 974.02, 1,344.45 and 624.64

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Solution

The fourth proportional to 974.02, 1,344.45 and 624.64 is: 862.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.02 : 1,344.45 = 624.64 : x
  2. Step 2: Convert to fraction form
    974.02/1,344.45 = 624.64/x
  3. Step 3: Cross multiply
    974.02x = 1,344.45 × 624.64
  4. Step 4: Simplify right side
    974.02x = 839,797.25
  5. Step 5: Solve for x
    x = 839,797.25/974.02
  6. Step 6: Final answer
    x = 862.20

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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.