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Finding the Fourth Proportional to 312.95, 467.49 and 306.87

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Solution

The fourth proportional to 312.95, 467.49 and 306.87 is: 458.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.95 : 467.49 = 306.87 : x
  2. Step 2: Convert to fraction form
    312.95/467.49 = 306.87/x
  3. Step 3: Cross multiply
    312.95x = 467.49 × 306.87
  4. Step 4: Simplify right side
    312.95x = 143,458.66
  5. Step 5: Solve for x
    x = 143,458.66/312.95
  6. Step 6: Final answer
    x = 458.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.