Home / 3,421.38-4,721.45-1,929.30

Finding the Fourth Proportional to 3,421.38, 4,721.45 and 1,929.30

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Solution

The fourth proportional to 3,421.38, 4,721.45 and 1,929.30 is: 2,662.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.38 : 4,721.45 = 1,929.30 : x
  2. Step 2: Convert to fraction form
    3,421.38/4,721.45 = 1,929.30/x
  3. Step 3: Cross multiply
    3,421.38x = 4,721.45 × 1,929.30
  4. Step 4: Simplify right side
    3,421.38x = 9,109,093.49
  5. Step 5: Solve for x
    x = 9,109,093.49/3,421.38
  6. Step 6: Final answer
    x = 2,662.40

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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.