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Finding the Fourth Proportional to 279.68, 419.37 and 106.39

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Solution

The fourth proportional to 279.68, 419.37 and 106.39 is: 159.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.68 : 419.37 = 106.39 : x
  2. Step 2: Convert to fraction form
    279.68/419.37 = 106.39/x
  3. Step 3: Cross multiply
    279.68x = 419.37 × 106.39
  4. Step 4: Simplify right side
    279.68x = 44,617.51
  5. Step 5: Solve for x
    x = 44,617.51/279.68
  6. Step 6: Final answer
    x = 159.53

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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.