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Finding the Fourth Proportional to 675.86, 1,013.78 and 310.95

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Solution

The fourth proportional to 675.86, 1,013.78 and 310.95 is: 466.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.86 : 1,013.78 = 310.95 : x
  2. Step 2: Convert to fraction form
    675.86/1,013.78 = 310.95/x
  3. Step 3: Cross multiply
    675.86x = 1,013.78 × 310.95
  4. Step 4: Simplify right side
    675.86x = 315,235.67
  5. Step 5: Solve for x
    x = 315,235.67/675.86
  6. Step 6: Final answer
    x = 466.43

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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.