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Finding the Fourth Proportional to 1,874.10, 2,811.15 and 1,326.90

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Solution

The fourth proportional to 1,874.10, 2,811.15 and 1,326.90 is: 1,990.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,874.10 : 2,811.15 = 1,326.90 : x
  2. Step 2: Convert to fraction form
    1,874.10/2,811.15 = 1,326.90/x
  3. Step 3: Cross multiply
    1,874.10x = 2,811.15 × 1,326.90
  4. Step 4: Simplify right side
    1,874.10x = 3,730,114.94
  5. Step 5: Solve for x
    x = 3,730,114.94/1,874.10
  6. Step 6: Final answer
    x = 1,990.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.