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Finding the Fourth Proportional to 436.71, 655.61 and 193.35

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Solution

The fourth proportional to 436.71, 655.61 and 193.35 is: 290.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.71 : 655.61 = 193.35 : x
  2. Step 2: Convert to fraction form
    436.71/655.61 = 193.35/x
  3. Step 3: Cross multiply
    436.71x = 655.61 × 193.35
  4. Step 4: Simplify right side
    436.71x = 126,761.23
  5. Step 5: Solve for x
    x = 126,761.23/436.71
  6. Step 6: Final answer
    x = 290.26

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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.