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Finding the Fourth Proportional to 1,101.56, 1,651.36 and 614.76

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Solution

The fourth proportional to 1,101.56, 1,651.36 and 614.76 is: 921.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.56 : 1,651.36 = 614.76 : x
  2. Step 2: Convert to fraction form
    1,101.56/1,651.36 = 614.76/x
  3. Step 3: Cross multiply
    1,101.56x = 1,651.36 × 614.76
  4. Step 4: Simplify right side
    1,101.56x = 1,015,190.07
  5. Step 5: Solve for x
    x = 1,015,190.07/1,101.56
  6. Step 6: Final answer
    x = 921.59

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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.