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Finding the Fourth Proportional to 718.06, 1,076.31 and 371.30

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Solution

The fourth proportional to 718.06, 1,076.31 and 371.30 is: 556.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.06 : 1,076.31 = 371.30 : x
  2. Step 2: Convert to fraction form
    718.06/1,076.31 = 371.30/x
  3. Step 3: Cross multiply
    718.06x = 1,076.31 × 371.30
  4. Step 4: Simplify right side
    718.06x = 399,633.90
  5. Step 5: Solve for x
    x = 399,633.90/718.06
  6. Step 6: Final answer
    x = 556.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.