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Finding the Fourth Proportional to 275.10, 411.66 and 153.48

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Solution

The fourth proportional to 275.10, 411.66 and 153.48 is: 229.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.10 : 411.66 = 153.48 : x
  2. Step 2: Convert to fraction form
    275.10/411.66 = 153.48/x
  3. Step 3: Cross multiply
    275.10x = 411.66 × 153.48
  4. Step 4: Simplify right side
    275.10x = 63,181.58
  5. Step 5: Solve for x
    x = 63,181.58/275.10
  6. Step 6: Final answer
    x = 229.67

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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.