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Finding the Fourth Proportional to 896.58, 1,342.98 and 781.11

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Solution

The fourth proportional to 896.58, 1,342.98 and 781.11 is: 1,170.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.58 : 1,342.98 = 781.11 : x
  2. Step 2: Convert to fraction form
    896.58/1,342.98 = 781.11/x
  3. Step 3: Cross multiply
    896.58x = 1,342.98 × 781.11
  4. Step 4: Simplify right side
    896.58x = 1,049,015.11
  5. Step 5: Solve for x
    x = 1,049,015.11/896.58
  6. Step 6: Final answer
    x = 1,170.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.