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Finding the Fourth Proportional to 1.77, 2.67 and 1.72

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Solution

The fourth proportional to 1.77, 2.67 and 1.72 is: 2.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.77 : 2.67 = 1.72 : x
  2. Step 2: Convert to fraction form
    1.77/2.67 = 1.72/x
  3. Step 3: Cross multiply
    1.77x = 2.67 × 1.72
  4. Step 4: Simplify right side
    1.77x = 4.59
  5. Step 5: Solve for x
    x = 4.59/1.77
  6. Step 6: Final answer
    x = 2.59

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.