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Finding the Fourth Proportional to 435.62, 653.12 and 253.36

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Solution

The fourth proportional to 435.62, 653.12 and 253.36 is: 379.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.62 : 653.12 = 253.36 : x
  2. Step 2: Convert to fraction form
    435.62/653.12 = 253.36/x
  3. Step 3: Cross multiply
    435.62x = 653.12 × 253.36
  4. Step 4: Simplify right side
    435.62x = 165,474.48
  5. Step 5: Solve for x
    x = 165,474.48/435.62
  6. Step 6: Final answer
    x = 379.86

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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.