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Finding the Fourth Proportional to 1,101.55, 1,520.64 and 682.49

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Solution

The fourth proportional to 1,101.55, 1,520.64 and 682.49 is: 942.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.55 : 1,520.64 = 682.49 : x
  2. Step 2: Convert to fraction form
    1,101.55/1,520.64 = 682.49/x
  3. Step 3: Cross multiply
    1,101.55x = 1,520.64 × 682.49
  4. Step 4: Simplify right side
    1,101.55x = 1,037,825.40
  5. Step 5: Solve for x
    x = 1,037,825.40/1,101.55
  6. Step 6: Final answer
    x = 942.15

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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.