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Finding the Fourth Proportional to 310.38, 465 and 194.58

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Solution

The fourth proportional to 310.38, 465 and 194.58 is: 291.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.38 : 465 = 194.58 : x
  2. Step 2: Convert to fraction form
    310.38/465 = 194.58/x
  3. Step 3: Cross multiply
    310.38x = 465 × 194.58
  4. Step 4: Simplify right side
    310.38x = 90,479.70
  5. Step 5: Solve for x
    x = 90,479.70/310.38
  6. Step 6: Final answer
    x = 291.51

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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.