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Finding the Fourth Proportional to 887.49, 1,331.42 and 310.77

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Solution

The fourth proportional to 887.49, 1,331.42 and 310.77 is: 466.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.49 : 1,331.42 = 310.77 : x
  2. Step 2: Convert to fraction form
    887.49/1,331.42 = 310.77/x
  3. Step 3: Cross multiply
    887.49x = 1,331.42 × 310.77
  4. Step 4: Simplify right side
    887.49x = 413,763.84
  5. Step 5: Solve for x
    x = 413,763.84/887.49
  6. Step 6: Final answer
    x = 466.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.