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Finding the Fourth Proportional to 1,013.20, 1,398.27 and 676.52

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Solution

The fourth proportional to 1,013.20, 1,398.27 and 676.52 is: 933.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.20 : 1,398.27 = 676.52 : x
  2. Step 2: Convert to fraction form
    1,013.20/1,398.27 = 676.52/x
  3. Step 3: Cross multiply
    1,013.20x = 1,398.27 × 676.52
  4. Step 4: Simplify right side
    1,013.20x = 945,957.62
  5. Step 5: Solve for x
    x = 945,957.62/1,013.20
  6. Step 6: Final answer
    x = 933.63

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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.