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Finding the Fourth Proportional to 1,170.01, 1,755.28 and 439.59

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Solution

The fourth proportional to 1,170.01, 1,755.28 and 439.59 is: 659.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.01 : 1,755.28 = 439.59 : x
  2. Step 2: Convert to fraction form
    1,170.01/1,755.28 = 439.59/x
  3. Step 3: Cross multiply
    1,170.01x = 1,755.28 × 439.59
  4. Step 4: Simplify right side
    1,170.01x = 771,609.57
  5. Step 5: Solve for x
    x = 771,609.57/1,170.01
  6. Step 6: Final answer
    x = 659.49

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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.