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Finding the Fourth Proportional to 881.80, 1,216.80 and 488.76

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Solution

The fourth proportional to 881.80, 1,216.80 and 488.76 is: 674.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.80 : 1,216.80 = 488.76 : x
  2. Step 2: Convert to fraction form
    881.80/1,216.80 = 488.76/x
  3. Step 3: Cross multiply
    881.80x = 1,216.80 × 488.76
  4. Step 4: Simplify right side
    881.80x = 594,723.17
  5. Step 5: Solve for x
    x = 594,723.17/881.80
  6. Step 6: Final answer
    x = 674.44

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Double scale
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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.