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Finding the Fourth Proportional to 0.77, 1.06 and 0.57

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Solution

The fourth proportional to 0.77, 1.06 and 0.57 is: 0.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    0.77 : 1.06 = 0.57 : x
  2. Step 2: Convert to fraction form
    0.77/1.06 = 0.57/x
  3. Step 3: Cross multiply
    0.77x = 1.06 × 0.57
  4. Step 4: Simplify right side
    0.77x = 0.60
  5. Step 5: Solve for x
    x = 0.60/0.77
  6. Step 6: Final answer
    x = 0.78

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Find fourth proportional to 0.38, 0.53 and 0.28
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.