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Finding the Fourth Proportional to 279.60, 419.25 and 106.13

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Solution

The fourth proportional to 279.60, 419.25 and 106.13 is: 159.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.60 : 419.25 = 106.13 : x
  2. Step 2: Convert to fraction form
    279.60/419.25 = 106.13/x
  3. Step 3: Cross multiply
    279.60x = 419.25 × 106.13
  4. Step 4: Simplify right side
    279.60x = 44,495.95
  5. Step 5: Solve for x
    x = 44,495.95/279.60
  6. Step 6: Final answer
    x = 159.14

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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.