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Finding the Fourth Proportional to 896.52, 1,346.40 and 691.60

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Solution

The fourth proportional to 896.52, 1,346.40 and 691.60 is: 1,038.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.52 : 1,346.40 = 691.60 : x
  2. Step 2: Convert to fraction form
    896.52/1,346.40 = 691.60/x
  3. Step 3: Cross multiply
    896.52x = 1,346.40 × 691.60
  4. Step 4: Simplify right side
    896.52x = 931,170.24
  5. Step 5: Solve for x
    x = 931,170.24/896.52
  6. Step 6: Final answer
    x = 1,038.65

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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.