Home / 2,390.21-3,297.17-2,221.08

Finding the Fourth Proportional to 2,390.21, 3,297.17 and 2,221.08

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Solution

The fourth proportional to 2,390.21, 3,297.17 and 2,221.08 is: 3,063.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.21 : 3,297.17 = 2,221.08 : x
  2. Step 2: Convert to fraction form
    2,390.21/3,297.17 = 2,221.08/x
  3. Step 3: Cross multiply
    2,390.21x = 3,297.17 × 2,221.08
  4. Step 4: Simplify right side
    2,390.21x = 7,323,263.16
  5. Step 5: Solve for x
    x = 7,323,263.16/2,390.21
  6. Step 6: Final answer
    x = 3,063.85

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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.