Home / 2,069.20-2,855.51-1,218.25

Finding the Fourth Proportional to 2,069.20, 2,855.51 and 1,218.25

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Solution

The fourth proportional to 2,069.20, 2,855.51 and 1,218.25 is: 1,681.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,069.20 : 2,855.51 = 1,218.25 : x
  2. Step 2: Convert to fraction form
    2,069.20/2,855.51 = 1,218.25/x
  3. Step 3: Cross multiply
    2,069.20x = 2,855.51 × 1,218.25
  4. Step 4: Simplify right side
    2,069.20x = 3,478,725.06
  5. Step 5: Solve for x
    x = 3,478,725.06/2,069.20
  6. Step 6: Final answer
    x = 1,681.19

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Double scale
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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.