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Finding the Fourth Proportional to 881.01, 1,321.92 and 419.04

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Solution

The fourth proportional to 881.01, 1,321.92 and 419.04 is: 628.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.01 : 1,321.92 = 419.04 : x
  2. Step 2: Convert to fraction form
    881.01/1,321.92 = 419.04/x
  3. Step 3: Cross multiply
    881.01x = 1,321.92 × 419.04
  4. Step 4: Simplify right side
    881.01x = 553,937.36
  5. Step 5: Solve for x
    x = 553,937.36/881.01
  6. Step 6: Final answer
    x = 628.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.