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Finding the Fourth Proportional to 718.12, 1,082.74 and 575.56

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Solution

The fourth proportional to 718.12, 1,082.74 and 575.56 is: 867.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.12 : 1,082.74 = 575.56 : x
  2. Step 2: Convert to fraction form
    718.12/1,082.74 = 575.56/x
  3. Step 3: Cross multiply
    718.12x = 1,082.74 × 575.56
  4. Step 4: Simplify right side
    718.12x = 623,181.83
  5. Step 5: Solve for x
    x = 623,181.83/718.12
  6. Step 6: Final answer
    x = 867.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.