Home / 2,146.82-3,220.37-686.08

Finding the Fourth Proportional to 2,146.82, 3,220.37 and 686.08

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Solution

The fourth proportional to 2,146.82, 3,220.37 and 686.08 is: 1,029.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,146.82 : 3,220.37 = 686.08 : x
  2. Step 2: Convert to fraction form
    2,146.82/3,220.37 = 686.08/x
  3. Step 3: Cross multiply
    2,146.82x = 3,220.37 × 686.08
  4. Step 4: Simplify right side
    2,146.82x = 2,209,431.45
  5. Step 5: Solve for x
    x = 2,209,431.45/2,146.82
  6. Step 6: Final answer
    x = 1,029.16

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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.