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Finding the Fourth Proportional to 892.16, 1,230.72 and 560.36

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Solution

The fourth proportional to 892.16, 1,230.72 and 560.36 is: 773.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.16 : 1,230.72 = 560.36 : x
  2. Step 2: Convert to fraction form
    892.16/1,230.72 = 560.36/x
  3. Step 3: Cross multiply
    892.16x = 1,230.72 × 560.36
  4. Step 4: Simplify right side
    892.16x = 689,646.26
  5. Step 5: Solve for x
    x = 689,646.26/892.16
  6. Step 6: Final answer
    x = 773.01

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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.