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Finding the Fourth Proportional to 1,282.71, 1,924.07 and 513.21

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Solution

The fourth proportional to 1,282.71, 1,924.07 and 513.21 is: 769.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.71 : 1,924.07 = 513.21 : x
  2. Step 2: Convert to fraction form
    1,282.71/1,924.07 = 513.21/x
  3. Step 3: Cross multiply
    1,282.71x = 1,924.07 × 513.21
  4. Step 4: Simplify right side
    1,282.71x = 987,449.40
  5. Step 5: Solve for x
    x = 987,449.40/1,282.71
  6. Step 6: Final answer
    x = 769.82

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.