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Finding the Fourth Proportional to 214.07, 320.90 and 153.18

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Solution

The fourth proportional to 214.07, 320.90 and 153.18 is: 229.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.07 : 320.90 = 153.18 : x
  2. Step 2: Convert to fraction form
    214.07/320.90 = 153.18/x
  3. Step 3: Cross multiply
    214.07x = 320.90 × 153.18
  4. Step 4: Simplify right side
    214.07x = 49,154.70
  5. Step 5: Solve for x
    x = 49,154.70/214.07
  6. Step 6: Final answer
    x = 229.63

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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.