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Finding the Fourth Proportional to 369.68, 554.60 and 113.20

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Solution

The fourth proportional to 369.68, 554.60 and 113.20 is: 169.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.68 : 554.60 = 113.20 : x
  2. Step 2: Convert to fraction form
    369.68/554.60 = 113.20/x
  3. Step 3: Cross multiply
    369.68x = 554.60 × 113.20
  4. Step 4: Simplify right side
    369.68x = 62,780.72
  5. Step 5: Solve for x
    x = 62,780.72/369.68
  6. Step 6: Final answer
    x = 169.82

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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.