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Finding the Fourth Proportional to 253.59, 349.94 and 143.05

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Solution

The fourth proportional to 253.59, 349.94 and 143.05 is: 197.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.59 : 349.94 = 143.05 : x
  2. Step 2: Convert to fraction form
    253.59/349.94 = 143.05/x
  3. Step 3: Cross multiply
    253.59x = 349.94 × 143.05
  4. Step 4: Simplify right side
    253.59x = 50,058.92
  5. Step 5: Solve for x
    x = 50,058.92/253.59
  6. Step 6: Final answer
    x = 197.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.