Home / 3,087.76-4,631.82-1,990.12

Finding the Fourth Proportional to 3,087.76, 4,631.82 and 1,990.12

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Solution

The fourth proportional to 3,087.76, 4,631.82 and 1,990.12 is: 2,985.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,087.76 : 4,631.82 = 1,990.12 : x
  2. Step 2: Convert to fraction form
    3,087.76/4,631.82 = 1,990.12/x
  3. Step 3: Cross multiply
    3,087.76x = 4,631.82 × 1,990.12
  4. Step 4: Simplify right side
    3,087.76x = 9,217,877.62
  5. Step 5: Solve for x
    x = 9,217,877.62/3,087.76
  6. Step 6: Final answer
    x = 2,985.30

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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.