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Finding the Fourth Proportional to 310.87, 466.37 and 105.40

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Solution

The fourth proportional to 310.87, 466.37 and 105.40 is: 158.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.87 : 466.37 = 105.40 : x
  2. Step 2: Convert to fraction form
    310.87/466.37 = 105.40/x
  3. Step 3: Cross multiply
    310.87x = 466.37 × 105.40
  4. Step 4: Simplify right side
    310.87x = 49,152.54
  5. Step 5: Solve for x
    x = 49,152.54/310.87
  6. Step 6: Final answer
    x = 158.12

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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.