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Finding the Fourth Proportional to 291.35, 436.88 and 174.35

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Solution

The fourth proportional to 291.35, 436.88 and 174.35 is: 261.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.35 : 436.88 = 174.35 : x
  2. Step 2: Convert to fraction form
    291.35/436.88 = 174.35/x
  3. Step 3: Cross multiply
    291.35x = 436.88 × 174.35
  4. Step 4: Simplify right side
    291.35x = 76,166.97
  5. Step 5: Solve for x
    x = 76,166.97/291.35
  6. Step 6: Final answer
    x = 261.43

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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.