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Finding the Fourth Proportional to 3,995.03, 5,990.04 and 1,220.78

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Solution

The fourth proportional to 3,995.03, 5,990.04 and 1,220.78 is: 1,830.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,995.03 : 5,990.04 = 1,220.78 : x
  2. Step 2: Convert to fraction form
    3,995.03/5,990.04 = 1,220.78/x
  3. Step 3: Cross multiply
    3,995.03x = 5,990.04 × 1,220.78
  4. Step 4: Simplify right side
    3,995.03x = 7,312,491.08
  5. Step 5: Solve for x
    x = 7,312,491.08/3,995.03
  6. Step 6: Final answer
    x = 1,830.40

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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.