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Finding the Fourth Proportional to 1,080.63, 1,491.27 and 632.81

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Solution

The fourth proportional to 1,080.63, 1,491.27 and 632.81 is: 873.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.63 : 1,491.27 = 632.81 : x
  2. Step 2: Convert to fraction form
    1,080.63/1,491.27 = 632.81/x
  3. Step 3: Cross multiply
    1,080.63x = 1,491.27 × 632.81
  4. Step 4: Simplify right side
    1,080.63x = 943,679.95
  5. Step 5: Solve for x
    x = 943,679.95/1,080.63
  6. Step 6: Final answer
    x = 873.27

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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.