Home / 1,512.20-2,083.12-1,315.38

Finding the Fourth Proportional to 1,512.20, 2,083.12 and 1,315.38

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Solution

The fourth proportional to 1,512.20, 2,083.12 and 1,315.38 is: 1,811.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,512.20 : 2,083.12 = 1,315.38 : x
  2. Step 2: Convert to fraction form
    1,512.20/2,083.12 = 1,315.38/x
  3. Step 3: Cross multiply
    1,512.20x = 2,083.12 × 1,315.38
  4. Step 4: Simplify right side
    1,512.20x = 2,740,094.39
  5. Step 5: Solve for x
    x = 2,740,094.39/1,512.20
  6. Step 6: Final answer
    x = 1,811.99

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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.