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Finding the Fourth Proportional to 2,678.85, 3,696.80 and 1,499.85

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Solution

The fourth proportional to 2,678.85, 3,696.80 and 1,499.85 is: 2,069.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,678.85 : 3,696.80 = 1,499.85 : x
  2. Step 2: Convert to fraction form
    2,678.85/3,696.80 = 1,499.85/x
  3. Step 3: Cross multiply
    2,678.85x = 3,696.80 × 1,499.85
  4. Step 4: Simplify right side
    2,678.85x = 5,544,637.98
  5. Step 5: Solve for x
    x = 5,544,637.98/2,678.85
  6. Step 6: Final answer
    x = 2,069.78

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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.