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Finding the Fourth Proportional to 2.89, 4 and 2.46

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Solution

The fourth proportional to 2.89, 4 and 2.46 is: 3.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.89 : 4 = 2.46 : x
  2. Step 2: Convert to fraction form
    2.89/4 = 2.46/x
  3. Step 3: Cross multiply
    2.89x = 4 × 2.46
  4. Step 4: Simplify right side
    2.89x = 9.84
  5. Step 5: Solve for x
    x = 9.84/2.89
  6. Step 6: Final answer
    x = 3.40

Related Problems

Find fourth proportional to 1.45, 2 and 1.23
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Double scale
Find fourth proportional to 3.89, 5.38 and 3.46
Similar ratio
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1.5x scale

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.