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Finding the Fourth Proportional to 253.63, 349.63 and 155.32

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Solution

The fourth proportional to 253.63, 349.63 and 155.32 is: 214.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.63 : 349.63 = 155.32 : x
  2. Step 2: Convert to fraction form
    253.63/349.63 = 155.32/x
  3. Step 3: Cross multiply
    253.63x = 349.63 × 155.32
  4. Step 4: Simplify right side
    253.63x = 54,304.53
  5. Step 5: Solve for x
    x = 54,304.53/253.63
  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.