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Finding the Fourth Proportional to 214.79, 322.18 and 106.65

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Solution

The fourth proportional to 214.79, 322.18 and 106.65 is: 159.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.79 : 322.18 = 106.65 : x
  2. Step 2: Convert to fraction form
    214.79/322.18 = 106.65/x
  3. Step 3: Cross multiply
    214.79x = 322.18 × 106.65
  4. Step 4: Simplify right side
    214.79x = 34,360.50
  5. Step 5: Solve for x
    x = 34,360.50/214.79
  6. Step 6: Final answer
    x = 159.97

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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.