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Finding the Fourth Proportional to 291.40, 436.96 and 169.70

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Solution

The fourth proportional to 291.40, 436.96 and 169.70 is: 254.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.40 : 436.96 = 169.70 : x
  2. Step 2: Convert to fraction form
    291.40/436.96 = 169.70/x
  3. Step 3: Cross multiply
    291.40x = 436.96 × 169.70
  4. Step 4: Simplify right side
    291.40x = 74,152.11
  5. Step 5: Solve for x
    x = 74,152.11/291.40
  6. Step 6: Final answer
    x = 254.47

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.