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Finding the Fourth Proportional to 215.19, 322.65 and 93.42

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Solution

The fourth proportional to 215.19, 322.65 and 93.42 is: 140.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.19 : 322.65 = 93.42 : x
  2. Step 2: Convert to fraction form
    215.19/322.65 = 93.42/x
  3. Step 3: Cross multiply
    215.19x = 322.65 × 93.42
  4. Step 4: Simplify right side
    215.19x = 30,141.96
  5. Step 5: Solve for x
    x = 30,141.96/215.19
  6. Step 6: Final answer
    x = 140.07

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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.