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Finding the Fourth Proportional to 435.39, 653.09 and 110.78

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Solution

The fourth proportional to 435.39, 653.09 and 110.78 is: 166.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.39 : 653.09 = 110.78 : x
  2. Step 2: Convert to fraction form
    435.39/653.09 = 110.78/x
  3. Step 3: Cross multiply
    435.39x = 653.09 × 110.78
  4. Step 4: Simplify right side
    435.39x = 72,350.39
  5. Step 5: Solve for x
    x = 72,350.39/435.39
  6. Step 6: Final answer
    x = 166.17

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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.