Home / 2,428.56-3,351.16-1,380.40

Finding the Fourth Proportional to 2,428.56, 3,351.16 and 1,380.40

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Solution

The fourth proportional to 2,428.56, 3,351.16 and 1,380.40 is: 1,904.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,428.56 : 3,351.16 = 1,380.40 : x
  2. Step 2: Convert to fraction form
    2,428.56/3,351.16 = 1,380.40/x
  3. Step 3: Cross multiply
    2,428.56x = 3,351.16 × 1,380.40
  4. Step 4: Simplify right side
    2,428.56x = 4,625,941.26
  5. Step 5: Solve for x
    x = 4,625,941.26/2,428.56
  6. Step 6: Final answer
    x = 1,904.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.