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Finding the Fourth Proportional to 0.99, 1.49 and 0.85

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Solution

The fourth proportional to 0.99, 1.49 and 0.85 is: 1.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    0.99 : 1.49 = 0.85 : x
  2. Step 2: Convert to fraction form
    0.99/1.49 = 0.85/x
  3. Step 3: Cross multiply
    0.99x = 1.49 × 0.85
  4. Step 4: Simplify right side
    0.99x = 1.26
  5. Step 5: Solve for x
    x = 1.26/0.99
  6. Step 6: Final answer
    x = 1.27

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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.