Home / 2,809.16-3,877.12-1,690.72

Finding the Fourth Proportional to 2,809.16, 3,877.12 and 1,690.72

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Solution

The fourth proportional to 2,809.16, 3,877.12 and 1,690.72 is: 2,333.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,809.16 : 3,877.12 = 1,690.72 : x
  2. Step 2: Convert to fraction form
    2,809.16/3,877.12 = 1,690.72/x
  3. Step 3: Cross multiply
    2,809.16x = 3,877.12 × 1,690.72
  4. Step 4: Simplify right side
    2,809.16x = 6,555,124.33
  5. Step 5: Solve for x
    x = 6,555,124.33/2,809.16
  6. Step 6: Final answer
    x = 2,333.48

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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.