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Finding the Fourth Proportional to 732.11, 1,090.80 and 690.19

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Solution

The fourth proportional to 732.11, 1,090.80 and 690.19 is: 1,028.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.11 : 1,090.80 = 690.19 : x
  2. Step 2: Convert to fraction form
    732.11/1,090.80 = 690.19/x
  3. Step 3: Cross multiply
    732.11x = 1,090.80 × 690.19
  4. Step 4: Simplify right side
    732.11x = 752,856.53
  5. Step 5: Solve for x
    x = 752,856.53/732.11
  6. Step 6: Final answer
    x = 1,028.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.