Home / 2,310.21-3,187.97-1,315.40

Finding the Fourth Proportional to 2,310.21, 3,187.97 and 1,315.40

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Solution

The fourth proportional to 2,310.21, 3,187.97 and 1,315.40 is: 1,815.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,310.21 : 3,187.97 = 1,315.40 : x
  2. Step 2: Convert to fraction form
    2,310.21/3,187.97 = 1,315.40/x
  3. Step 3: Cross multiply
    2,310.21x = 3,187.97 × 1,315.40
  4. Step 4: Simplify right side
    2,310.21x = 4,193,433.22
  5. Step 5: Solve for x
    x = 4,193,433.22/2,310.21
  6. Step 6: Final answer
    x = 1,815.17

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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.