Home / 3,286.10-4,929.15-1,990.10

Finding the Fourth Proportional to 3,286.10, 4,929.15 and 1,990.10

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Solution

The fourth proportional to 3,286.10, 4,929.15 and 1,990.10 is: 2,985.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,286.10 : 4,929.15 = 1,990.10 : x
  2. Step 2: Convert to fraction form
    3,286.10/4,929.15 = 1,990.10/x
  3. Step 3: Cross multiply
    3,286.10x = 4,929.15 × 1,990.10
  4. Step 4: Simplify right side
    3,286.10x = 9,809,501.42
  5. Step 5: Solve for x
    x = 9,809,501.42/3,286.10
  6. Step 6: Final answer
    x = 2,985.15

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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.