Home / 2,138.28-3,210.60-1,314.18

Finding the Fourth Proportional to 2,138.28, 3,210.60 and 1,314.18

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Solution

The fourth proportional to 2,138.28, 3,210.60 and 1,314.18 is: 1,973.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.28 : 3,210.60 = 1,314.18 : x
  2. Step 2: Convert to fraction form
    2,138.28/3,210.60 = 1,314.18/x
  3. Step 3: Cross multiply
    2,138.28x = 3,210.60 × 1,314.18
  4. Step 4: Simplify right side
    2,138.28x = 4,219,306.31
  5. Step 5: Solve for x
    x = 4,219,306.31/2,138.28
  6. Step 6: Final answer
    x = 1,973.22

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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.