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Finding the Fourth Proportional to 369.58, 554.36 and 138.46

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Solution

The fourth proportional to 369.58, 554.36 and 138.46 is: 207.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.58 : 554.36 = 138.46 : x
  2. Step 2: Convert to fraction form
    369.58/554.36 = 138.46/x
  3. Step 3: Cross multiply
    369.58x = 554.36 × 138.46
  4. Step 4: Simplify right side
    369.58x = 76,756.69
  5. Step 5: Solve for x
    x = 76,756.69/369.58
  6. Step 6: Final answer
    x = 207.69

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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.