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Finding the Fourth Proportional to 295.20, 442.80 and 102.78

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Solution

The fourth proportional to 295.20, 442.80 and 102.78 is: 154.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.20 : 442.80 = 102.78 : x
  2. Step 2: Convert to fraction form
    295.20/442.80 = 102.78/x
  3. Step 3: Cross multiply
    295.20x = 442.80 × 102.78
  4. Step 4: Simplify right side
    295.20x = 45,510.98
  5. Step 5: Solve for x
    x = 45,510.98/295.20
  6. Step 6: Final answer
    x = 154.17

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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.