Home / 2,685.61-3,709.28-2,149.11

Finding the Fourth Proportional to 2,685.61, 3,709.28 and 2,149.11

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Solution

The fourth proportional to 2,685.61, 3,709.28 and 2,149.11 is: 2,968.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.61 : 3,709.28 = 2,149.11 : x
  2. Step 2: Convert to fraction form
    2,685.61/3,709.28 = 2,149.11/x
  3. Step 3: Cross multiply
    2,685.61x = 3,709.28 × 2,149.11
  4. Step 4: Simplify right side
    2,685.61x = 7,971,650.74
  5. Step 5: Solve for x
    x = 7,971,650.74/2,685.61
  6. Step 6: Final answer
    x = 2,968.28

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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.