Home / 2,851.08-3,931.68-1,671.72

Finding the Fourth Proportional to 2,851.08, 3,931.68 and 1,671.72

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Solution

The fourth proportional to 2,851.08, 3,931.68 and 1,671.72 is: 2,305.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,851.08 : 3,931.68 = 1,671.72 : x
  2. Step 2: Convert to fraction form
    2,851.08/3,931.68 = 1,671.72/x
  3. Step 3: Cross multiply
    2,851.08x = 3,931.68 × 1,671.72
  4. Step 4: Simplify right side
    2,851.08x = 6,572,668.09
  5. Step 5: Solve for x
    x = 6,572,668.09/2,851.08
  6. Step 6: Final answer
    x = 2,305.33

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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.