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Finding the Fourth Proportional to 214.72, 322.08 and 70.44

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Solution

The fourth proportional to 214.72, 322.08 and 70.44 is: 105.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.72 : 322.08 = 70.44 : x
  2. Step 2: Convert to fraction form
    214.72/322.08 = 70.44/x
  3. Step 3: Cross multiply
    214.72x = 322.08 × 70.44
  4. Step 4: Simplify right side
    214.72x = 22,687.32
  5. Step 5: Solve for x
    x = 22,687.32/214.72
  6. Step 6: Final answer
    x = 105.66

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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.