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Finding the Fourth Proportional to 887.43, 1,221.83 and 676.93

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Solution

The fourth proportional to 887.43, 1,221.83 and 676.93 is: 932.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.43 : 1,221.83 = 676.93 : x
  2. Step 2: Convert to fraction form
    887.43/1,221.83 = 676.93/x
  3. Step 3: Cross multiply
    887.43x = 1,221.83 × 676.93
  4. Step 4: Simplify right side
    887.43x = 827,093.38
  5. Step 5: Solve for x
    x = 827,093.38/887.43
  6. Step 6: Final answer
    x = 932.01

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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.