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Finding the Fourth Proportional to 1,815.29, 2,724.15 and 775.53

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Solution

The fourth proportional to 1,815.29, 2,724.15 and 775.53 is: 1,163.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.29 : 2,724.15 = 775.53 : x
  2. Step 2: Convert to fraction form
    1,815.29/2,724.15 = 775.53/x
  3. Step 3: Cross multiply
    1,815.29x = 2,724.15 × 775.53
  4. Step 4: Simplify right side
    1,815.29x = 2,112,656.17
  5. Step 5: Solve for x
    x = 2,112,656.17/1,815.29
  6. Step 6: Final answer
    x = 1,163.82

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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.