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Finding the Fourth Proportional to 976.36, 1,348.28 and 627.66

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Solution

The fourth proportional to 976.36, 1,348.28 and 627.66 is: 866.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.36 : 1,348.28 = 627.66 : x
  2. Step 2: Convert to fraction form
    976.36/1,348.28 = 627.66/x
  3. Step 3: Cross multiply
    976.36x = 1,348.28 × 627.66
  4. Step 4: Simplify right side
    976.36x = 846,261.42
  5. Step 5: Solve for x
    x = 846,261.42/976.36
  6. Step 6: Final answer
    x = 866.75

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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.