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Finding the Fourth Proportional to 895.91, 1,236.02 and 660.42

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Solution

The fourth proportional to 895.91, 1,236.02 and 660.42 is: 911.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.91 : 1,236.02 = 660.42 : x
  2. Step 2: Convert to fraction form
    895.91/1,236.02 = 660.42/x
  3. Step 3: Cross multiply
    895.91x = 1,236.02 × 660.42
  4. Step 4: Simplify right side
    895.91x = 816,288.19
  5. Step 5: Solve for x
    x = 816,288.19/895.91
  6. Step 6: Final answer
    x = 911.13

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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.