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Finding the Fourth Proportional to 2,763.60, 4,145.88 and 914.79

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Solution

The fourth proportional to 2,763.60, 4,145.88 and 914.79 is: 1,372.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,763.60 : 4,145.88 = 914.79 : x
  2. Step 2: Convert to fraction form
    2,763.60/4,145.88 = 914.79/x
  3. Step 3: Cross multiply
    2,763.60x = 4,145.88 × 914.79
  4. Step 4: Simplify right side
    2,763.60x = 3,792,609.57
  5. Step 5: Solve for x
    x = 3,792,609.57/2,763.60
  6. Step 6: Final answer
    x = 1,372.34

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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.