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Finding the Fourth Proportional to 253.80, 347.90 and 247.59

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Solution

The fourth proportional to 253.80, 347.90 and 247.59 is: 339.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.80 : 347.90 = 247.59 : x
  2. Step 2: Convert to fraction form
    253.80/347.90 = 247.59/x
  3. Step 3: Cross multiply
    253.80x = 347.90 × 247.59
  4. Step 4: Simplify right side
    253.80x = 86,135.32
  5. Step 5: Solve for x
    x = 86,135.32/253.80
  6. Step 6: Final answer
    x = 339.38

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.