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Finding the Fourth Proportional to 218.04, 300.60 and 140.28

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Solution

The fourth proportional to 218.04, 300.60 and 140.28 is: 193.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.04 : 300.60 = 140.28 : x
  2. Step 2: Convert to fraction form
    218.04/300.60 = 140.28/x
  3. Step 3: Cross multiply
    218.04x = 300.60 × 140.28
  4. Step 4: Simplify right side
    218.04x = 42,168.17
  5. Step 5: Solve for x
    x = 42,168.17/218.04
  6. Step 6: Final answer
    x = 193.40

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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.