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Finding the Fourth Proportional to 278.89, 419.19 and 176.83

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Solution

The fourth proportional to 278.89, 419.19 and 176.83 is: 265.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.89 : 419.19 = 176.83 : x
  2. Step 2: Convert to fraction form
    278.89/419.19 = 176.83/x
  3. Step 3: Cross multiply
    278.89x = 419.19 × 176.83
  4. Step 4: Simplify right side
    278.89x = 74,125.37
  5. Step 5: Solve for x
    x = 74,125.37/278.89
  6. Step 6: Final answer
    x = 265.79

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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.