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Finding the Fourth Proportional to 253.39, 349.71 and 155.14

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Solution

The fourth proportional to 253.39, 349.71 and 155.14 is: 214.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.39 : 349.71 = 155.14 : x
  2. Step 2: Convert to fraction form
    253.39/349.71 = 155.14/x
  3. Step 3: Cross multiply
    253.39x = 349.71 × 155.14
  4. Step 4: Simplify right side
    253.39x = 54,254.01
  5. Step 5: Solve for x
    x = 54,254.01/253.39
  6. Step 6: Final answer
    x = 214.11

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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.