Home / 2,140.20-2,953.44-1,208.70

Finding the Fourth Proportional to 2,140.20, 2,953.44 and 1,208.70

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Solution

The fourth proportional to 2,140.20, 2,953.44 and 1,208.70 is: 1,667.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.20 : 2,953.44 = 1,208.70 : x
  2. Step 2: Convert to fraction form
    2,140.20/2,953.44 = 1,208.70/x
  3. Step 3: Cross multiply
    2,140.20x = 2,953.44 × 1,208.70
  4. Step 4: Simplify right side
    2,140.20x = 3,569,822.93
  5. Step 5: Solve for x
    x = 3,569,822.93/2,140.20
  6. Step 6: Final answer
    x = 1,667.99

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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.