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Finding the Fourth Proportional to 291.43, 436.35 and 154.19

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Solution

The fourth proportional to 291.43, 436.35 and 154.19 is: 230.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.43 : 436.35 = 154.19 : x
  2. Step 2: Convert to fraction form
    291.43/436.35 = 154.19/x
  3. Step 3: Cross multiply
    291.43x = 436.35 × 154.19
  4. Step 4: Simplify right side
    291.43x = 67,280.81
  5. Step 5: Solve for x
    x = 67,280.81/291.43
  6. Step 6: Final answer
    x = 230.86

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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.