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Finding the Fourth Proportional to 4.99, 7.50 and 4.57

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Solution

The fourth proportional to 4.99, 7.50 and 4.57 is: 6.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.99 : 7.50 = 4.57 : x
  2. Step 2: Convert to fraction form
    4.99/7.50 = 4.57/x
  3. Step 3: Cross multiply
    4.99x = 7.50 × 4.57
  4. Step 4: Simplify right side
    4.99x = 34.28
  5. Step 5: Solve for x
    x = 34.28/4.99
  6. Step 6: Final answer
    x = 6.87

Related Problems

Find fourth proportional to 2.50, 3.75 and 2.29
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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.