Home / 3,330.18-4,995.30-990.21

Finding the Fourth Proportional to 3,330.18, 4,995.30 and 990.21

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Solution

The fourth proportional to 3,330.18, 4,995.30 and 990.21 is: 1,485.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,330.18 : 4,995.30 = 990.21 : x
  2. Step 2: Convert to fraction form
    3,330.18/4,995.30 = 990.21/x
  3. Step 3: Cross multiply
    3,330.18x = 4,995.30 × 990.21
  4. Step 4: Simplify right side
    3,330.18x = 4,946,396.01
  5. Step 5: Solve for x
    x = 4,946,396.01/3,330.18
  6. Step 6: Final answer
    x = 1,485.32

Related Problems

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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.