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Finding the Fourth Proportional to 215.28, 322.75 and 106.99

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Solution

The fourth proportional to 215.28, 322.75 and 106.99 is: 160.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.28 : 322.75 = 106.99 : x
  2. Step 2: Convert to fraction form
    215.28/322.75 = 106.99/x
  3. Step 3: Cross multiply
    215.28x = 322.75 × 106.99
  4. Step 4: Simplify right side
    215.28x = 34,531.02
  5. Step 5: Solve for x
    x = 34,531.02/215.28
  6. Step 6: Final answer
    x = 160.40

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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.