Home / 2,787.10-4,172.55-1,690.90

Finding the Fourth Proportional to 2,787.10, 4,172.55 and 1,690.90

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Solution

The fourth proportional to 2,787.10, 4,172.55 and 1,690.90 is: 2,531.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.10 : 4,172.55 = 1,690.90 : x
  2. Step 2: Convert to fraction form
    2,787.10/4,172.55 = 1,690.90/x
  3. Step 3: Cross multiply
    2,787.10x = 4,172.55 × 1,690.90
  4. Step 4: Simplify right side
    2,787.10x = 7,055,364.80
  5. Step 5: Solve for x
    x = 7,055,364.80/2,787.10
  6. Step 6: Final answer
    x = 2,531.44

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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.