Home / 3,320.74-4,981.86-1,129.48

Finding the Fourth Proportional to 3,320.74, 4,981.86 and 1,129.48

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Solution

The fourth proportional to 3,320.74, 4,981.86 and 1,129.48 is: 1,694.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.74 : 4,981.86 = 1,129.48 : x
  2. Step 2: Convert to fraction form
    3,320.74/4,981.86 = 1,129.48/x
  3. Step 3: Cross multiply
    3,320.74x = 4,981.86 × 1,129.48
  4. Step 4: Simplify right side
    3,320.74x = 5,626,911.23
  5. Step 5: Solve for x
    x = 5,626,911.23/3,320.74
  6. Step 6: Final answer
    x = 1,694.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.