Home / 3,320.32-4,980.49-1,239.78

Finding the Fourth Proportional to 3,320.32, 4,980.49 and 1,239.78

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Solution

The fourth proportional to 3,320.32, 4,980.49 and 1,239.78 is: 1,859.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.32 : 4,980.49 = 1,239.78 : x
  2. Step 2: Convert to fraction form
    3,320.32/4,980.49 = 1,239.78/x
  3. Step 3: Cross multiply
    3,320.32x = 4,980.49 × 1,239.78
  4. Step 4: Simplify right side
    3,320.32x = 6,174,713.46
  5. Step 5: Solve for x
    x = 6,174,713.46/3,320.32
  6. Step 6: Final answer
    x = 1,859.68

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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.