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Finding the Fourth Proportional to 1,422.04, 1,962.42 and 801

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Solution

The fourth proportional to 1,422.04, 1,962.42 and 801 is: 1,105.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.04 : 1,962.42 = 801 : x
  2. Step 2: Convert to fraction form
    1,422.04/1,962.42 = 801/x
  3. Step 3: Cross multiply
    1,422.04x = 1,962.42 × 801
  4. Step 4: Simplify right side
    1,422.04x = 1,571,898.42
  5. Step 5: Solve for x
    x = 1,571,898.42/1,422.04
  6. Step 6: Final answer
    x = 1,105.38

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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.