Home / 2,334.90-3,221.64-1,390.22

Finding the Fourth Proportional to 2,334.90, 3,221.64 and 1,390.22

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Solution

The fourth proportional to 2,334.90, 3,221.64 and 1,390.22 is: 1,918.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,334.90 : 3,221.64 = 1,390.22 : x
  2. Step 2: Convert to fraction form
    2,334.90/3,221.64 = 1,390.22/x
  3. Step 3: Cross multiply
    2,334.90x = 3,221.64 × 1,390.22
  4. Step 4: Simplify right side
    2,334.90x = 4,478,788.36
  5. Step 5: Solve for x
    x = 4,478,788.36/2,334.90
  6. Step 6: Final answer
    x = 1,918.19

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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.