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Finding the Fourth Proportional to 1,170.76, 1,756.62 and 622.78

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Solution

The fourth proportional to 1,170.76, 1,756.62 and 622.78 is: 934.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.76 : 1,756.62 = 622.78 : x
  2. Step 2: Convert to fraction form
    1,170.76/1,756.62 = 622.78/x
  3. Step 3: Cross multiply
    1,170.76x = 1,756.62 × 622.78
  4. Step 4: Simplify right side
    1,170.76x = 1,093,987.80
  5. Step 5: Solve for x
    x = 1,093,987.80/1,170.76
  6. Step 6: Final answer
    x = 934.43

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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.