Home / 2,450.79-3,381.28-1,388.45

Finding the Fourth Proportional to 2,450.79, 3,381.28 and 1,388.45

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Solution

The fourth proportional to 2,450.79, 3,381.28 and 1,388.45 is: 1,915.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,450.79 : 3,381.28 = 1,388.45 : x
  2. Step 2: Convert to fraction form
    2,450.79/3,381.28 = 1,388.45/x
  3. Step 3: Cross multiply
    2,450.79x = 3,381.28 × 1,388.45
  4. Step 4: Simplify right side
    2,450.79x = 4,694,743.20
  5. Step 5: Solve for x
    x = 4,694,743.20/2,450.79
  6. Step 6: Final answer
    x = 1,915.60

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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.