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Finding the Fourth Proportional to 435.80, 653.79 and 127.65

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Solution

The fourth proportional to 435.80, 653.79 and 127.65 is: 191.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.80 : 653.79 = 127.65 : x
  2. Step 2: Convert to fraction form
    435.80/653.79 = 127.65/x
  3. Step 3: Cross multiply
    435.80x = 653.79 × 127.65
  4. Step 4: Simplify right side
    435.80x = 83,456.29
  5. Step 5: Solve for x
    x = 83,456.29/435.80
  6. Step 6: Final answer
    x = 191.50

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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.