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Finding the Fourth Proportional to 881.80, 1,322.40 and 470.71

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Solution

The fourth proportional to 881.80, 1,322.40 and 470.71 is: 705.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.80 : 1,322.40 = 470.71 : x
  2. Step 2: Convert to fraction form
    881.80/1,322.40 = 470.71/x
  3. Step 3: Cross multiply
    881.80x = 1,322.40 × 470.71
  4. Step 4: Simplify right side
    881.80x = 622,466.90
  5. Step 5: Solve for x
    x = 622,466.90/881.80
  6. Step 6: Final answer
    x = 705.90

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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.