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Finding the Fourth Proportional to 368.80, 553.14 and 112.28

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Solution

The fourth proportional to 368.80, 553.14 and 112.28 is: 168.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.80 : 553.14 = 112.28 : x
  2. Step 2: Convert to fraction form
    368.80/553.14 = 112.28/x
  3. Step 3: Cross multiply
    368.80x = 553.14 × 112.28
  4. Step 4: Simplify right side
    368.80x = 62,106.56
  5. Step 5: Solve for x
    x = 62,106.56/368.80
  6. Step 6: Final answer
    x = 168.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.