Home / 3,994.78-5,989.67-1,220.53

Finding the Fourth Proportional to 3,994.78, 5,989.67 and 1,220.53

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Solution

The fourth proportional to 3,994.78, 5,989.67 and 1,220.53 is: 1,830.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,994.78 : 5,989.67 = 1,220.53 : x
  2. Step 2: Convert to fraction form
    3,994.78/5,989.67 = 1,220.53/x
  3. Step 3: Cross multiply
    3,994.78x = 5,989.67 × 1,220.53
  4. Step 4: Simplify right side
    3,994.78x = 7,310,565.82
  5. Step 5: Solve for x
    x = 7,310,565.82/3,994.78
  6. Step 6: Final answer
    x = 1,830.03

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Double scale
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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.