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Finding the Fourth Proportional to 883.62, 1,216.80 and 662.22

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Solution

The fourth proportional to 883.62, 1,216.80 and 662.22 is: 911.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.62 : 1,216.80 = 662.22 : x
  2. Step 2: Convert to fraction form
    883.62/1,216.80 = 662.22/x
  3. Step 3: Cross multiply
    883.62x = 1,216.80 × 662.22
  4. Step 4: Simplify right side
    883.62x = 805,789.30
  5. Step 5: Solve for x
    x = 805,789.30/883.62
  6. Step 6: Final answer
    x = 911.92

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1.5x scale

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.