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Finding the Fourth Proportional to 1,010.48, 1,394.33 and 679.55

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Solution

The fourth proportional to 1,010.48, 1,394.33 and 679.55 is: 937.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.48 : 1,394.33 = 679.55 : x
  2. Step 2: Convert to fraction form
    1,010.48/1,394.33 = 679.55/x
  3. Step 3: Cross multiply
    1,010.48x = 1,394.33 × 679.55
  4. Step 4: Simplify right side
    1,010.48x = 947,506.58
  5. Step 5: Solve for x
    x = 947,506.58/1,010.48
  6. Step 6: Final answer
    x = 937.68

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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.