Home / 1,186.04-1,774.20-989.21

Finding the Fourth Proportional to 1,186.04, 1,774.20 and 989.21

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Solution

The fourth proportional to 1,186.04, 1,774.20 and 989.21 is: 1,479.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.04 : 1,774.20 = 989.21 : x
  2. Step 2: Convert to fraction form
    1,186.04/1,774.20 = 989.21/x
  3. Step 3: Cross multiply
    1,186.04x = 1,774.20 × 989.21
  4. Step 4: Simplify right side
    1,186.04x = 1,755,056.38
  5. Step 5: Solve for x
    x = 1,755,056.38/1,186.04
  6. Step 6: Final answer
    x = 1,479.76

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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.