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Finding the Fourth Proportional to 1,080.84, 1,491.15 and 682.39

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Solution

The fourth proportional to 1,080.84, 1,491.15 and 682.39 is: 941.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.84 : 1,491.15 = 682.39 : x
  2. Step 2: Convert to fraction form
    1,080.84/1,491.15 = 682.39/x
  3. Step 3: Cross multiply
    1,080.84x = 1,491.15 × 682.39
  4. Step 4: Simplify right side
    1,080.84x = 1,017,542.12
  5. Step 5: Solve for x
    x = 1,017,542.12/1,080.84
  6. Step 6: Final answer
    x = 941.44

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1.5x scale

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.