Home / 2,179.48-3,006.78-1,247.32

Finding the Fourth Proportional to 2,179.48, 3,006.78 and 1,247.32

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Solution

The fourth proportional to 2,179.48, 3,006.78 and 1,247.32 is: 1,720.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.48 : 3,006.78 = 1,247.32 : x
  2. Step 2: Convert to fraction form
    2,179.48/3,006.78 = 1,247.32/x
  3. Step 3: Cross multiply
    2,179.48x = 3,006.78 × 1,247.32
  4. Step 4: Simplify right side
    2,179.48x = 3,750,416.83
  5. Step 5: Solve for x
    x = 3,750,416.83/2,179.48
  6. Step 6: Final answer
    x = 1,720.79

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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.