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Finding the Fourth Proportional to 1,080.61, 1,491.23 and 614.86

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Solution

The fourth proportional to 1,080.61, 1,491.23 and 614.86 is: 848.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.61 : 1,491.23 = 614.86 : x
  2. Step 2: Convert to fraction form
    1,080.61/1,491.23 = 614.86/x
  3. Step 3: Cross multiply
    1,080.61x = 1,491.23 × 614.86
  4. Step 4: Simplify right side
    1,080.61x = 916,897.68
  5. Step 5: Solve for x
    x = 916,897.68/1,080.61
  6. Step 6: Final answer
    x = 848.50

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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.