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Finding the Fourth Proportional to 22.60, 31.00 and 22.02

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Solution

The fourth proportional to 22.60, 31.00 and 22.02 is: 30.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.60 : 31.00 = 22.02 : x
  2. Step 2: Convert to fraction form
    22.60/31.00 = 22.02/x
  3. Step 3: Cross multiply
    22.60x = 31.00 × 22.02
  4. Step 4: Simplify right side
    22.60x = 682.81
  5. Step 5: Solve for x
    x = 682.81/22.60
  6. Step 6: Final answer
    x = 30.22

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.