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Finding the Fourth Proportional to 881.51, 1,216.49 and 488.55

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Solution

The fourth proportional to 881.51, 1,216.49 and 488.55 is: 674.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.51 : 1,216.49 = 488.55 : x
  2. Step 2: Convert to fraction form
    881.51/1,216.49 = 488.55/x
  3. Step 3: Cross multiply
    881.51x = 1,216.49 × 488.55
  4. Step 4: Simplify right side
    881.51x = 594,313.75
  5. Step 5: Solve for x
    x = 594,313.75/881.51
  6. Step 6: Final answer
    x = 674.20

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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.