Home / 2,455.20-3,388.36-1,393.15

Finding the Fourth Proportional to 2,455.20, 3,388.36 and 1,393.15

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Solution

The fourth proportional to 2,455.20, 3,388.36 and 1,393.15 is: 1,922.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,455.20 : 3,388.36 = 1,393.15 : x
  2. Step 2: Convert to fraction form
    2,455.20/3,388.36 = 1,393.15/x
  3. Step 3: Cross multiply
    2,455.20x = 3,388.36 × 1,393.15
  4. Step 4: Simplify right side
    2,455.20x = 4,720,491.24
  5. Step 5: Solve for x
    x = 4,720,491.24/2,455.20
  6. Step 6: Final answer
    x = 1,922.65

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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.