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Finding the Fourth Proportional to 2.93, 4 and 2.87

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Solution

The fourth proportional to 2.93, 4 and 2.87 is: 3.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.93 : 4 = 2.87 : x
  2. Step 2: Convert to fraction form
    2.93/4 = 2.87/x
  3. Step 3: Cross multiply
    2.93x = 4 × 2.87
  4. Step 4: Simplify right side
    2.93x = 11.48
  5. Step 5: Solve for x
    x = 11.48/2.93
  6. Step 6: Final answer
    x = 3.92

Related Problems

Find fourth proportional to 1.46, 2 and 1.44
Half scale
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Double scale
Find fourth proportional to 3.93, 5.37 and 3.87
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.