Home / 3,174.30-4,380.81-1,915.74

Finding the Fourth Proportional to 3,174.30, 4,380.81 and 1,915.74

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Solution

The fourth proportional to 3,174.30, 4,380.81 and 1,915.74 is: 2,643.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,174.30 : 4,380.81 = 1,915.74 : x
  2. Step 2: Convert to fraction form
    3,174.30/4,380.81 = 1,915.74/x
  3. Step 3: Cross multiply
    3,174.30x = 4,380.81 × 1,915.74
  4. Step 4: Simplify right side
    3,174.30x = 8,392,492.95
  5. Step 5: Solve for x
    x = 8,392,492.95/3,174.30
  6. Step 6: Final answer
    x = 2,643.89

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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.