Home / 2,979.72-4,109.13-1,985.04

Finding the Fourth Proportional to 2,979.72, 4,109.13 and 1,985.04

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Solution

The fourth proportional to 2,979.72, 4,109.13 and 1,985.04 is: 2,737.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.72 : 4,109.13 = 1,985.04 : x
  2. Step 2: Convert to fraction form
    2,979.72/4,109.13 = 1,985.04/x
  3. Step 3: Cross multiply
    2,979.72x = 4,109.13 × 1,985.04
  4. Step 4: Simplify right side
    2,979.72x = 8,156,787.42
  5. Step 5: Solve for x
    x = 8,156,787.42/2,979.72
  6. Step 6: Final answer
    x = 2,737.43

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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.