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Finding the Fourth Proportional to 1,013.40, 1,399.14 and 827.34

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Solution

The fourth proportional to 1,013.40, 1,399.14 and 827.34 is: 1,142.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.40 : 1,399.14 = 827.34 : x
  2. Step 2: Convert to fraction form
    1,013.40/1,399.14 = 827.34/x
  3. Step 3: Cross multiply
    1,013.40x = 1,399.14 × 827.34
  4. Step 4: Simplify right side
    1,013.40x = 1,157,564.49
  5. Step 5: Solve for x
    x = 1,157,564.49/1,013.40
  6. Step 6: Final answer
    x = 1,142.26

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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.