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Finding the Fourth Proportional to 435.90, 653.84 and 111.28

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Solution

The fourth proportional to 435.90, 653.84 and 111.28 is: 166.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.90 : 653.84 = 111.28 : x
  2. Step 2: Convert to fraction form
    435.90/653.84 = 111.28/x
  3. Step 3: Cross multiply
    435.90x = 653.84 × 111.28
  4. Step 4: Simplify right side
    435.90x = 72,759.32
  5. Step 5: Solve for x
    x = 72,759.32/435.90
  6. Step 6: Final answer
    x = 166.92

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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.