Home / 2,197.20-3,031.41-1,312.77

Finding the Fourth Proportional to 2,197.20, 3,031.41 and 1,312.77

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Solution

The fourth proportional to 2,197.20, 3,031.41 and 1,312.77 is: 1,811.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,197.20 : 3,031.41 = 1,312.77 : x
  2. Step 2: Convert to fraction form
    2,197.20/3,031.41 = 1,312.77/x
  3. Step 3: Cross multiply
    2,197.20x = 3,031.41 × 1,312.77
  4. Step 4: Simplify right side
    2,197.20x = 3,979,544.11
  5. Step 5: Solve for x
    x = 3,979,544.11/2,197.20
  6. Step 6: Final answer
    x = 1,811.19

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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.