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Finding the Fourth Proportional to 29.19, 40.30 and 20.00

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Solution

The fourth proportional to 29.19, 40.30 and 20.00 is: 27.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.19 : 40.30 = 20.00 : x
  2. Step 2: Convert to fraction form
    29.19/40.30 = 20.00/x
  3. Step 3: Cross multiply
    29.19x = 40.30 × 20.00
  4. Step 4: Simplify right side
    29.19x = 805.82
  5. Step 5: Solve for x
    x = 805.82/29.19
  6. Step 6: Final answer
    x = 27.60

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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.