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Finding the Fourth Proportional to 1.07, 1.60 and 0.91

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Solution

The fourth proportional to 1.07, 1.60 and 0.91 is: 1.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.07 : 1.60 = 0.91 : x
  2. Step 2: Convert to fraction form
    1.07/1.60 = 0.91/x
  3. Step 3: Cross multiply
    1.07x = 1.60 × 0.91
  4. Step 4: Simplify right side
    1.07x = 1.45
  5. Step 5: Solve for x
    x = 1.45/1.07
  6. Step 6: Final answer
    x = 1.35

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Double scale
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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.