Home / 1,122.60-1,549.35-674.49

Finding the Fourth Proportional to 1,122.60, 1,549.35 and 674.49

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Solution

The fourth proportional to 1,122.60, 1,549.35 and 674.49 is: 930.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.60 : 1,549.35 = 674.49 : x
  2. Step 2: Convert to fraction form
    1,122.60/1,549.35 = 674.49/x
  3. Step 3: Cross multiply
    1,122.60x = 1,549.35 × 674.49
  4. Step 4: Simplify right side
    1,122.60x = 1,045,021.08
  5. Step 5: Solve for x
    x = 1,045,021.08/1,122.60
  6. Step 6: Final answer
    x = 930.89

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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.