Home / 2,140.23-3,209.25-840.99

Finding the Fourth Proportional to 2,140.23, 3,209.25 and 840.99

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Solution

The fourth proportional to 2,140.23, 3,209.25 and 840.99 is: 1,261.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.23 : 3,209.25 = 840.99 : x
  2. Step 2: Convert to fraction form
    2,140.23/3,209.25 = 840.99/x
  3. Step 3: Cross multiply
    2,140.23x = 3,209.25 × 840.99
  4. Step 4: Simplify right side
    2,140.23x = 2,698,947.16
  5. Step 5: Solve for x
    x = 2,698,947.16/2,140.23
  6. Step 6: Final answer
    x = 1,261.05

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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.