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Finding the Fourth Proportional to 887.91, 1,332.09 and 310.79

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Solution

The fourth proportional to 887.91, 1,332.09 and 310.79 is: 466.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.91 : 1,332.09 = 310.79 : x
  2. Step 2: Convert to fraction form
    887.91/1,332.09 = 310.79/x
  3. Step 3: Cross multiply
    887.91x = 1,332.09 × 310.79
  4. Step 4: Simplify right side
    887.91x = 413,993.59
  5. Step 5: Solve for x
    x = 413,993.59/887.91
  6. Step 6: Final answer
    x = 466.26

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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.