Home / 2,316.80-3,197.40-1,321.88

Finding the Fourth Proportional to 2,316.80, 3,197.40 and 1,321.88

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Solution

The fourth proportional to 2,316.80, 3,197.40 and 1,321.88 is: 1,824.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,316.80 : 3,197.40 = 1,321.88 : x
  2. Step 2: Convert to fraction form
    2,316.80/3,197.40 = 1,321.88/x
  3. Step 3: Cross multiply
    2,316.80x = 3,197.40 × 1,321.88
  4. Step 4: Simplify right side
    2,316.80x = 4,226,579.11
  5. Step 5: Solve for x
    x = 4,226,579.11/2,316.80
  6. Step 6: Final answer
    x = 1,824.32

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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.