Home / 2,143.70-3,210.75-1,319.30

Finding the Fourth Proportional to 2,143.70, 3,210.75 and 1,319.30

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Solution

The fourth proportional to 2,143.70, 3,210.75 and 1,319.30 is: 1,976.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.70 : 3,210.75 = 1,319.30 : x
  2. Step 2: Convert to fraction form
    2,143.70/3,210.75 = 1,319.30/x
  3. Step 3: Cross multiply
    2,143.70x = 3,210.75 × 1,319.30
  4. Step 4: Simplify right side
    2,143.70x = 4,235,942.48
  5. Step 5: Solve for x
    x = 4,235,942.48/2,143.70
  6. Step 6: Final answer
    x = 1,976.00

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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.