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Finding the Fourth Proportional to 1,422.27, 1,963.16 and 898.65

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Solution

The fourth proportional to 1,422.27, 1,963.16 and 898.65 is: 1,240.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.27 : 1,963.16 = 898.65 : x
  2. Step 2: Convert to fraction form
    1,422.27/1,963.16 = 898.65/x
  3. Step 3: Cross multiply
    1,422.27x = 1,963.16 × 898.65
  4. Step 4: Simplify right side
    1,422.27x = 1,764,189.24
  5. Step 5: Solve for x
    x = 1,764,189.24/1,422.27
  6. Step 6: Final answer
    x = 1,240.40

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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.