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Finding the Fourth Proportional to 887.78, 1,331.68 and 310.66

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Solution

The fourth proportional to 887.78, 1,331.68 and 310.66 is: 465.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.78 : 1,331.68 = 310.66 : x
  2. Step 2: Convert to fraction form
    887.78/1,331.68 = 310.66/x
  3. Step 3: Cross multiply
    887.78x = 1,331.68 × 310.66
  4. Step 4: Simplify right side
    887.78x = 413,699.71
  5. Step 5: Solve for x
    x = 413,699.71/887.78
  6. Step 6: Final answer
    x = 465.99

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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.