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Finding the Fourth Proportional to 3,995.02, 5,990.82 and 1,220.86

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Solution

The fourth proportional to 3,995.02, 5,990.82 and 1,220.86 is: 1,830.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,995.02 : 5,990.82 = 1,220.86 : x
  2. Step 2: Convert to fraction form
    3,995.02/5,990.82 = 1,220.86/x
  3. Step 3: Cross multiply
    3,995.02x = 5,990.82 × 1,220.86
  4. Step 4: Simplify right side
    3,995.02x = 7,313,952.51
  5. Step 5: Solve for x
    x = 7,313,952.51/3,995.02
  6. Step 6: Final answer
    x = 1,830.77

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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.