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Finding the Fourth Proportional to 262.88, 393.80 and 247.89

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Solution

The fourth proportional to 262.88, 393.80 and 247.89 is: 371.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.88 : 393.80 = 247.89 : x
  2. Step 2: Convert to fraction form
    262.88/393.80 = 247.89/x
  3. Step 3: Cross multiply
    262.88x = 393.80 × 247.89
  4. Step 4: Simplify right side
    262.88x = 97,617.84
  5. Step 5: Solve for x
    x = 97,617.84/262.88
  6. Step 6: Final answer
    x = 371.35

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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.