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Finding the Fourth Proportional to 986.48, 1,480.33 and 576.42

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Solution

The fourth proportional to 986.48, 1,480.33 and 576.42 is: 864.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.48 : 1,480.33 = 576.42 : x
  2. Step 2: Convert to fraction form
    986.48/1,480.33 = 576.42/x
  3. Step 3: Cross multiply
    986.48x = 1,480.33 × 576.42
  4. Step 4: Simplify right side
    986.48x = 853,283.75
  5. Step 5: Solve for x
    x = 853,283.75/986.48
  6. Step 6: Final answer
    x = 864.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.