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Finding the Fourth Proportional to 5, 7.50 and 2.99

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Solution

The fourth proportional to 5, 7.50 and 2.99 is: 4.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5 : 7.50 = 2.99 : x
  2. Step 2: Convert to fraction form
    5/7.50 = 2.99/x
  3. Step 3: Cross multiply
    5x = 7.50 × 2.99
  4. Step 4: Simplify right side
    5x = 22.43
  5. Step 5: Solve for x
    x = 22.43/5
  6. Step 6: Final answer
    x = 4.49

Related Problems

Find fourth proportional to 2.50, 3.75 and 1.50
Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.