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Finding the Fourth Proportional to 279.70, 419.61 and 117.30

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Solution

The fourth proportional to 279.70, 419.61 and 117.30 is: 175.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.70 : 419.61 = 117.30 : x
  2. Step 2: Convert to fraction form
    279.70/419.61 = 117.30/x
  3. Step 3: Cross multiply
    279.70x = 419.61 × 117.30
  4. Step 4: Simplify right side
    279.70x = 49,220.25
  5. Step 5: Solve for x
    x = 49,220.25/279.70
  6. Step 6: Final answer
    x = 175.98

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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.