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Finding the Fourth Proportional to 896.13, 1,344.58 and 485.56

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Solution

The fourth proportional to 896.13, 1,344.58 and 485.56 is: 728.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.13 : 1,344.58 = 485.56 : x
  2. Step 2: Convert to fraction form
    896.13/1,344.58 = 485.56/x
  3. Step 3: Cross multiply
    896.13x = 1,344.58 × 485.56
  4. Step 4: Simplify right side
    896.13x = 652,874.26
  5. Step 5: Solve for x
    x = 652,874.26/896.13
  6. Step 6: Final answer
    x = 728.55

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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.