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Finding the Fourth Proportional to 253.55, 349.87 and 155.29

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Solution

The fourth proportional to 253.55, 349.87 and 155.29 is: 214.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.55 : 349.87 = 155.29 : x
  2. Step 2: Convert to fraction form
    253.55/349.87 = 155.29/x
  3. Step 3: Cross multiply
    253.55x = 349.87 × 155.29
  4. Step 4: Simplify right side
    253.55x = 54,331.31
  5. Step 5: Solve for x
    x = 54,331.31/253.55
  6. Step 6: Final answer
    x = 214.28

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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.