Home / 2,860.38-3,945.69-1,681.20

Finding the Fourth Proportional to 2,860.38, 3,945.69 and 1,681.20

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Solution

The fourth proportional to 2,860.38, 3,945.69 and 1,681.20 is: 2,319.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,860.38 : 3,945.69 = 1,681.20 : x
  2. Step 2: Convert to fraction form
    2,860.38/3,945.69 = 1,681.20/x
  3. Step 3: Cross multiply
    2,860.38x = 3,945.69 × 1,681.20
  4. Step 4: Simplify right side
    2,860.38x = 6,633,494.03
  5. Step 5: Solve for x
    x = 6,633,494.03/2,860.38
  6. Step 6: Final answer
    x = 2,319.10

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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.