Home / 3,108.15-4,289.58-1,782

Finding the Fourth Proportional to 3,108.15, 4,289.58 and 1,782

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Solution

The fourth proportional to 3,108.15, 4,289.58 and 1,782 is: 2,459.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.15 : 4,289.58 = 1,782 : x
  2. Step 2: Convert to fraction form
    3,108.15/4,289.58 = 1,782/x
  3. Step 3: Cross multiply
    3,108.15x = 4,289.58 × 1,782
  4. Step 4: Simplify right side
    3,108.15x = 7,644,031.56
  5. Step 5: Solve for x
    x = 7,644,031.56/3,108.15
  6. Step 6: Final answer
    x = 2,459.35

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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.