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Finding the Fourth Proportional to 278.88, 384.43 and 229.67

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Solution

The fourth proportional to 278.88, 384.43 and 229.67 is: 316.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.88 : 384.43 = 229.67 : x
  2. Step 2: Convert to fraction form
    278.88/384.43 = 229.67/x
  3. Step 3: Cross multiply
    278.88x = 384.43 × 229.67
  4. Step 4: Simplify right side
    278.88x = 88,292.04
  5. Step 5: Solve for x
    x = 88,292.04/278.88
  6. Step 6: Final answer
    x = 316.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.