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Finding the Fourth Proportional to 154.69, 231.58 and 103.20

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Solution

The fourth proportional to 154.69, 231.58 and 103.20 is: 154.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.69 : 231.58 = 103.20 : x
  2. Step 2: Convert to fraction form
    154.69/231.58 = 103.20/x
  3. Step 3: Cross multiply
    154.69x = 231.58 × 103.20
  4. Step 4: Simplify right side
    154.69x = 23,899.06
  5. Step 5: Solve for x
    x = 23,899.06/154.69
  6. Step 6: Final answer
    x = 154.50

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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.