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Finding the Fourth Proportional to 2,763.93, 4,145.05 and 914.70

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Solution

The fourth proportional to 2,763.93, 4,145.05 and 914.70 is: 1,371.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,763.93 : 4,145.05 = 914.70 : x
  2. Step 2: Convert to fraction form
    2,763.93/4,145.05 = 914.70/x
  3. Step 3: Cross multiply
    2,763.93x = 4,145.05 × 914.70
  4. Step 4: Simplify right side
    2,763.93x = 3,791,474.95
  5. Step 5: Solve for x
    x = 3,791,474.95/2,763.93
  6. Step 6: Final answer
    x = 1,371.77

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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.