Home / 3,398.18-4,689.90-1,981.92

Finding the Fourth Proportional to 3,398.18, 4,689.90 and 1,981.92

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Solution

The fourth proportional to 3,398.18, 4,689.90 and 1,981.92 is: 2,735.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,398.18 : 4,689.90 = 1,981.92 : x
  2. Step 2: Convert to fraction form
    3,398.18/4,689.90 = 1,981.92/x
  3. Step 3: Cross multiply
    3,398.18x = 4,689.90 × 1,981.92
  4. Step 4: Simplify right side
    3,398.18x = 9,295,006.61
  5. Step 5: Solve for x
    x = 9,295,006.61/3,398.18
  6. Step 6: Final answer
    x = 2,735.29

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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.