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Finding the Fourth Proportional to 896.31, 1,236.16 and 616.10

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Solution

The fourth proportional to 896.31, 1,236.16 and 616.10 is: 849.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.31 : 1,236.16 = 616.10 : x
  2. Step 2: Convert to fraction form
    896.31/1,236.16 = 616.10/x
  3. Step 3: Cross multiply
    896.31x = 1,236.16 × 616.10
  4. Step 4: Simplify right side
    896.31x = 761,598.18
  5. Step 5: Solve for x
    x = 761,598.18/896.31
  6. Step 6: Final answer
    x = 849.70

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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.