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Finding the Fourth Proportional to 262.19, 392.75 and 153.92

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Solution

The fourth proportional to 262.19, 392.75 and 153.92 is: 230.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.19 : 392.75 = 153.92 : x
  2. Step 2: Convert to fraction form
    262.19/392.75 = 153.92/x
  3. Step 3: Cross multiply
    262.19x = 392.75 × 153.92
  4. Step 4: Simplify right side
    262.19x = 60,452.87
  5. Step 5: Solve for x
    x = 60,452.87/262.19
  6. Step 6: Final answer
    x = 230.57

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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.