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Finding the Fourth Proportional to 986.04, 1,479.96 and 677.13

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Solution

The fourth proportional to 986.04, 1,479.96 and 677.13 is: 1,016.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.04 : 1,479.96 = 677.13 : x
  2. Step 2: Convert to fraction form
    986.04/1,479.96 = 677.13/x
  3. Step 3: Cross multiply
    986.04x = 1,479.96 × 677.13
  4. Step 4: Simplify right side
    986.04x = 1,002,119.76
  5. Step 5: Solve for x
    x = 1,002,119.76/986.04
  6. Step 6: Final answer
    x = 1,016.31

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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.