Home / 3,108.12-4,289.31-1,782.15

Finding the Fourth Proportional to 3,108.12, 4,289.31 and 1,782.15

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Solution

The fourth proportional to 3,108.12, 4,289.31 and 1,782.15 is: 2,459.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.12 : 4,289.31 = 1,782.15 : x
  2. Step 2: Convert to fraction form
    3,108.12/4,289.31 = 1,782.15/x
  3. Step 3: Cross multiply
    3,108.12x = 4,289.31 × 1,782.15
  4. Step 4: Simplify right side
    3,108.12x = 7,644,193.82
  5. Step 5: Solve for x
    x = 7,644,193.82/3,108.12
  6. Step 6: Final answer
    x = 2,459.43

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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.