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Finding the Fourth Proportional to 310.49, 465.67 and 143.67

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Solution

The fourth proportional to 310.49, 465.67 and 143.67 is: 215.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.49 : 465.67 = 143.67 : x
  2. Step 2: Convert to fraction form
    310.49/465.67 = 143.67/x
  3. Step 3: Cross multiply
    310.49x = 465.67 × 143.67
  4. Step 4: Simplify right side
    310.49x = 66,902.81
  5. Step 5: Solve for x
    x = 66,902.81/310.49
  6. Step 6: Final answer
    x = 215.48

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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.