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Finding the Fourth Proportional to 245, 367.62 and 100.72

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Solution

The fourth proportional to 245, 367.62 and 100.72 is: 151.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    245 : 367.62 = 100.72 : x
  2. Step 2: Convert to fraction form
    245/367.62 = 100.72/x
  3. Step 3: Cross multiply
    245x = 367.62 × 100.72
  4. Step 4: Simplify right side
    245x = 37,026.69
  5. Step 5: Solve for x
    x = 37,026.69/245
  6. Step 6: Final answer
    x = 151.13

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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.