Home / 2,084.40-3,126.60-1,428.30

Finding the Fourth Proportional to 2,084.40, 3,126.60 and 1,428.30

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Solution

The fourth proportional to 2,084.40, 3,126.60 and 1,428.30 is: 2,142.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,084.40 : 3,126.60 = 1,428.30 : x
  2. Step 2: Convert to fraction form
    2,084.40/3,126.60 = 1,428.30/x
  3. Step 3: Cross multiply
    2,084.40x = 3,126.60 × 1,428.30
  4. Step 4: Simplify right side
    2,084.40x = 4,465,722.78
  5. Step 5: Solve for x
    x = 4,465,722.78/2,084.40
  6. Step 6: Final answer
    x = 2,142.45

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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.