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Finding the Fourth Proportional to 1,170.19, 1,755.38 and 520.75

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Solution

The fourth proportional to 1,170.19, 1,755.38 and 520.75 is: 781.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.19 : 1,755.38 = 520.75 : x
  2. Step 2: Convert to fraction form
    1,170.19/1,755.38 = 520.75/x
  3. Step 3: Cross multiply
    1,170.19x = 1,755.38 × 520.75
  4. Step 4: Simplify right side
    1,170.19x = 914,114.14
  5. Step 5: Solve for x
    x = 914,114.14/1,170.19
  6. Step 6: Final answer
    x = 781.17

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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.