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Finding the Fourth Proportional to 31.24, 43.04 and 22.00

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Solution

The fourth proportional to 31.24, 43.04 and 22.00 is: 30.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.24 : 43.04 = 22.00 : x
  2. Step 2: Convert to fraction form
    31.24/43.04 = 22.00/x
  3. Step 3: Cross multiply
    31.24x = 43.04 × 22.00
  4. Step 4: Simplify right side
    31.24x = 946.82
  5. Step 5: Solve for x
    x = 946.82/31.24
  6. Step 6: Final answer
    x = 30.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.