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Finding the Fourth Proportional to 262.39, 392.97 and 253.28

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Solution

The fourth proportional to 262.39, 392.97 and 253.28 is: 379.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.39 : 392.97 = 253.28 : x
  2. Step 2: Convert to fraction form
    262.39/392.97 = 253.28/x
  3. Step 3: Cross multiply
    262.39x = 392.97 × 253.28
  4. Step 4: Simplify right side
    262.39x = 99,529.48
  5. Step 5: Solve for x
    x = 99,529.48/262.39
  6. Step 6: Final answer
    x = 379.33

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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.