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Finding the Fourth Proportional to 215.52, 321.98 and 214.32

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Solution

The fourth proportional to 215.52, 321.98 and 214.32 is: 320.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.52 : 321.98 = 214.32 : x
  2. Step 2: Convert to fraction form
    215.52/321.98 = 214.32/x
  3. Step 3: Cross multiply
    215.52x = 321.98 × 214.32
  4. Step 4: Simplify right side
    215.52x = 69,006.75
  5. Step 5: Solve for x
    x = 69,006.75/215.52
  6. Step 6: Final answer
    x = 320.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.