Home / 2,455.72-3,388.84-1,408.40

Finding the Fourth Proportional to 2,455.72, 3,388.84 and 1,408.40

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Solution

The fourth proportional to 2,455.72, 3,388.84 and 1,408.40 is: 1,943.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,455.72 : 3,388.84 = 1,408.40 : x
  2. Step 2: Convert to fraction form
    2,455.72/3,388.84 = 1,408.40/x
  3. Step 3: Cross multiply
    2,455.72x = 3,388.84 × 1,408.40
  4. Step 4: Simplify right side
    2,455.72x = 4,772,842.26
  5. Step 5: Solve for x
    x = 4,772,842.26/2,455.72
  6. Step 6: Final answer
    x = 1,943.56

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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.