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Finding the Fourth Proportional to 887.27, 1,335.87 and 645.48

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Solution

The fourth proportional to 887.27, 1,335.87 and 645.48 is: 971.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.27 : 1,335.87 = 645.48 : x
  2. Step 2: Convert to fraction form
    887.27/1,335.87 = 645.48/x
  3. Step 3: Cross multiply
    887.27x = 1,335.87 × 645.48
  4. Step 4: Simplify right side
    887.27x = 862,277.37
  5. Step 5: Solve for x
    x = 862,277.37/887.27
  6. Step 6: Final answer
    x = 971.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.