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Finding the Fourth Proportional to 1,034.52, 1,427.36 and 685.14

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Solution

The fourth proportional to 1,034.52, 1,427.36 and 685.14 is: 945.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,034.52 : 1,427.36 = 685.14 : x
  2. Step 2: Convert to fraction form
    1,034.52/1,427.36 = 685.14/x
  3. Step 3: Cross multiply
    1,034.52x = 1,427.36 × 685.14
  4. Step 4: Simplify right side
    1,034.52x = 977,941.43
  5. Step 5: Solve for x
    x = 977,941.43/1,034.52
  6. Step 6: Final answer
    x = 945.31

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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.