Home / 2,587.78-3,571.20-1,408.85

Finding the Fourth Proportional to 2,587.78, 3,571.20 and 1,408.85

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Solution

The fourth proportional to 2,587.78, 3,571.20 and 1,408.85 is: 1,944.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.78 : 3,571.20 = 1,408.85 : x
  2. Step 2: Convert to fraction form
    2,587.78/3,571.20 = 1,408.85/x
  3. Step 3: Cross multiply
    2,587.78x = 3,571.20 × 1,408.85
  4. Step 4: Simplify right side
    2,587.78x = 5,031,285.12
  5. Step 5: Solve for x
    x = 5,031,285.12/2,587.78
  6. Step 6: Final answer
    x = 1,944.25

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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.