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Finding the Fourth Proportional to 896.25, 1,236.51 and 564.56

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Solution

The fourth proportional to 896.25, 1,236.51 and 564.56 is: 778.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.25 : 1,236.51 = 564.56 : x
  2. Step 2: Convert to fraction form
    896.25/1,236.51 = 564.56/x
  3. Step 3: Cross multiply
    896.25x = 1,236.51 × 564.56
  4. Step 4: Simplify right side
    896.25x = 698,077.90
  5. Step 5: Solve for x
    x = 698,077.90/896.25
  6. Step 6: Final answer
    x = 778.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.