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Finding the Fourth Proportional to 278.61, 417.88 and 95.99

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Solution

The fourth proportional to 278.61, 417.88 and 95.99 is: 143.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.61 : 417.88 = 95.99 : x
  2. Step 2: Convert to fraction form
    278.61/417.88 = 95.99/x
  3. Step 3: Cross multiply
    278.61x = 417.88 × 95.99
  4. Step 4: Simplify right side
    278.61x = 40,110.60
  5. Step 5: Solve for x
    x = 40,110.60/278.61
  6. Step 6: Final answer
    x = 143.96

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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.