Home / 2,900.40-3,997.08-2,151.60

Finding the Fourth Proportional to 2,900.40, 3,997.08 and 2,151.60

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Solution

The fourth proportional to 2,900.40, 3,997.08 and 2,151.60 is: 2,965.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,900.40 : 3,997.08 = 2,151.60 : x
  2. Step 2: Convert to fraction form
    2,900.40/3,997.08 = 2,151.60/x
  3. Step 3: Cross multiply
    2,900.40x = 3,997.08 × 2,151.60
  4. Step 4: Simplify right side
    2,900.40x = 8,600,117.33
  5. Step 5: Solve for x
    x = 8,600,117.33/2,900.40
  6. Step 6: Final answer
    x = 2,965.15

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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.