Home / 3,521.78-5,285.86-1,879.72

Finding the Fourth Proportional to 3,521.78, 5,285.86 and 1,879.72

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Solution

The fourth proportional to 3,521.78, 5,285.86 and 1,879.72 is: 2,821.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,521.78 : 5,285.86 = 1,879.72 : x
  2. Step 2: Convert to fraction form
    3,521.78/5,285.86 = 1,879.72/x
  3. Step 3: Cross multiply
    3,521.78x = 5,285.86 × 1,879.72
  4. Step 4: Simplify right side
    3,521.78x = 9,935,936.76
  5. Step 5: Solve for x
    x = 9,935,936.76/3,521.78
  6. Step 6: Final answer
    x = 2,821.28

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1.5x scale

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.