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Finding the Fourth Proportional to 263.70, 393.31 and 247.17

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Solution

The fourth proportional to 263.70, 393.31 and 247.17 is: 368.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.70 : 393.31 = 247.17 : x
  2. Step 2: Convert to fraction form
    263.70/393.31 = 247.17/x
  3. Step 3: Cross multiply
    263.70x = 393.31 × 247.17
  4. Step 4: Simplify right side
    263.70x = 97,211.85
  5. Step 5: Solve for x
    x = 97,211.85/263.70
  6. Step 6: Final answer
    x = 368.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.