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Finding the Fourth Proportional to 263.98, 397.63 and 247.78

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Solution

The fourth proportional to 263.98, 397.63 and 247.78 is: 373.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.98 : 397.63 = 247.78 : x
  2. Step 2: Convert to fraction form
    263.98/397.63 = 247.78/x
  3. Step 3: Cross multiply
    263.98x = 397.63 × 247.78
  4. Step 4: Simplify right side
    263.98x = 98,524.76
  5. Step 5: Solve for x
    x = 98,524.76/263.98
  6. Step 6: Final answer
    x = 373.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.