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Finding the Fourth Proportional to 1,080.42, 1,491 and 614.66

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Solution

The fourth proportional to 1,080.42, 1,491 and 614.66 is: 848.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.42 : 1,491 = 614.66 : x
  2. Step 2: Convert to fraction form
    1,080.42/1,491 = 614.66/x
  3. Step 3: Cross multiply
    1,080.42x = 1,491 × 614.66
  4. Step 4: Simplify right side
    1,080.42x = 916,458.06
  5. Step 5: Solve for x
    x = 916,458.06/1,080.42
  6. Step 6: Final answer
    x = 848.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.