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Finding the Fourth Proportional to 1.80, 2.68 and 1.29

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Solution

The fourth proportional to 1.80, 2.68 and 1.29 is: 1.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.80 : 2.68 = 1.29 : x
  2. Step 2: Convert to fraction form
    1.80/2.68 = 1.29/x
  3. Step 3: Cross multiply
    1.80x = 2.68 × 1.29
  4. Step 4: Simplify right side
    1.80x = 3.46
  5. Step 5: Solve for x
    x = 3.46/1.80
  6. Step 6: Final answer
    x = 1.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.