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Finding the Fourth Proportional to 940.31, 1,297.43 and 547.13

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Solution

The fourth proportional to 940.31, 1,297.43 and 547.13 is: 754.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.31 : 1,297.43 = 547.13 : x
  2. Step 2: Convert to fraction form
    940.31/1,297.43 = 547.13/x
  3. Step 3: Cross multiply
    940.31x = 1,297.43 × 547.13
  4. Step 4: Simplify right side
    940.31x = 709,862.88
  5. Step 5: Solve for x
    x = 709,862.88/940.31
  6. Step 6: Final answer
    x = 754.92

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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.