Home / 3,398.63-4,688.79-2,139.21

Finding the Fourth Proportional to 3,398.63, 4,688.79 and 2,139.21

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Solution

The fourth proportional to 3,398.63, 4,688.79 and 2,139.21 is: 2,951.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,398.63 : 4,688.79 = 2,139.21 : x
  2. Step 2: Convert to fraction form
    3,398.63/4,688.79 = 2,139.21/x
  3. Step 3: Cross multiply
    3,398.63x = 4,688.79 × 2,139.21
  4. Step 4: Simplify right side
    3,398.63x = 10,030,298.43
  5. Step 5: Solve for x
    x = 10,030,298.43/3,398.63
  6. Step 6: Final answer
    x = 2,951.28

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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.