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Finding the Fourth Proportional to 1,815.65, 2,716.67 and 1,520

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Solution

The fourth proportional to 1,815.65, 2,716.67 and 1,520 is: 2,274.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.65 : 2,716.67 = 1,520 : x
  2. Step 2: Convert to fraction form
    1,815.65/2,716.67 = 1,520/x
  3. Step 3: Cross multiply
    1,815.65x = 2,716.67 × 1,520
  4. Step 4: Simplify right side
    1,815.65x = 4,129,338.40
  5. Step 5: Solve for x
    x = 4,129,338.40/1,815.65
  6. Step 6: Final answer
    x = 2,274.30

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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.