Home / 2,722.02-4,084.64-990.78

Finding the Fourth Proportional to 2,722.02, 4,084.64 and 990.78

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Solution

The fourth proportional to 2,722.02, 4,084.64 and 990.78 is: 1,486.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,722.02 : 4,084.64 = 990.78 : x
  2. Step 2: Convert to fraction form
    2,722.02/4,084.64 = 990.78/x
  3. Step 3: Cross multiply
    2,722.02x = 4,084.64 × 990.78
  4. Step 4: Simplify right side
    2,722.02x = 4,046,979.62
  5. Step 5: Solve for x
    x = 4,046,979.62/2,722.02
  6. Step 6: Final answer
    x = 1,486.76

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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.