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Finding the Fourth Proportional to 253.04, 349.21 and 148.21

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Solution

The fourth proportional to 253.04, 349.21 and 148.21 is: 204.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.04 : 349.21 = 148.21 : x
  2. Step 2: Convert to fraction form
    253.04/349.21 = 148.21/x
  3. Step 3: Cross multiply
    253.04x = 349.21 × 148.21
  4. Step 4: Simplify right side
    253.04x = 51,755.15
  5. Step 5: Solve for x
    x = 51,755.15/253.04
  6. Step 6: Final answer
    x = 204.53

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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.