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Finding the Fourth Proportional to 291.16, 435.96 and 153.92

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Solution

The fourth proportional to 291.16, 435.96 and 153.92 is: 230.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.16 : 435.96 = 153.92 : x
  2. Step 2: Convert to fraction form
    291.16/435.96 = 153.92/x
  3. Step 3: Cross multiply
    291.16x = 435.96 × 153.92
  4. Step 4: Simplify right side
    291.16x = 67,102.96
  5. Step 5: Solve for x
    x = 67,102.96/291.16
  6. Step 6: Final answer
    x = 230.47

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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.