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Finding the Fourth Proportional to 435.76, 653.10 and 252.78

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Solution

The fourth proportional to 435.76, 653.10 and 252.78 is: 378.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.76 : 653.10 = 252.78 : x
  2. Step 2: Convert to fraction form
    435.76/653.10 = 252.78/x
  3. Step 3: Cross multiply
    435.76x = 653.10 × 252.78
  4. Step 4: Simplify right side
    435.76x = 165,090.62
  5. Step 5: Solve for x
    x = 165,090.62/435.76
  6. Step 6: Final answer
    x = 378.86

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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.