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Finding the Fourth Proportional to 214.85, 322.13 and 133.45

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Solution

The fourth proportional to 214.85, 322.13 and 133.45 is: 200.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.85 : 322.13 = 133.45 : x
  2. Step 2: Convert to fraction form
    214.85/322.13 = 133.45/x
  3. Step 3: Cross multiply
    214.85x = 322.13 × 133.45
  4. Step 4: Simplify right side
    214.85x = 42,987.03
  5. Step 5: Solve for x
    x = 42,987.03/214.85
  6. Step 6: Final answer
    x = 200.08

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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.