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Finding the Fourth Proportional to 253.14, 349.32 and 159.75

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Solution

The fourth proportional to 253.14, 349.32 and 159.75 is: 220.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.14 : 349.32 = 159.75 : x
  2. Step 2: Convert to fraction form
    253.14/349.32 = 159.75/x
  3. Step 3: Cross multiply
    253.14x = 349.32 × 159.75
  4. Step 4: Simplify right side
    253.14x = 55,803.87
  5. Step 5: Solve for x
    x = 55,803.87/253.14
  6. Step 6: Final answer
    x = 220.45

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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.