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Finding the Fourth Proportional to 0.73, 1.09 and 0.64

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Solution

The fourth proportional to 0.73, 1.09 and 0.64 is: 0.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    0.73 : 1.09 = 0.64 : x
  2. Step 2: Convert to fraction form
    0.73/1.09 = 0.64/x
  3. Step 3: Cross multiply
    0.73x = 1.09 × 0.64
  4. Step 4: Simplify right side
    0.73x = 0.70
  5. Step 5: Solve for x
    x = 0.70/0.73
  6. Step 6: Final answer
    x = 0.96

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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.