Home / 2,787.96-4,180.13-913.62

Finding the Fourth Proportional to 2,787.96, 4,180.13 and 913.62

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Solution

The fourth proportional to 2,787.96, 4,180.13 and 913.62 is: 1,369.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.96 : 4,180.13 = 913.62 : x
  2. Step 2: Convert to fraction form
    2,787.96/4,180.13 = 913.62/x
  3. Step 3: Cross multiply
    2,787.96x = 4,180.13 × 913.62
  4. Step 4: Simplify right side
    2,787.96x = 3,819,045.80
  5. Step 5: Solve for x
    x = 3,819,045.80/2,787.96
  6. Step 6: Final answer
    x = 1,369.84

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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.