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Finding the Fourth Proportional to 1,295.66, 1,942.41 and 515.17

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Solution

The fourth proportional to 1,295.66, 1,942.41 and 515.17 is: 772.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.66 : 1,942.41 = 515.17 : x
  2. Step 2: Convert to fraction form
    1,295.66/1,942.41 = 515.17/x
  3. Step 3: Cross multiply
    1,295.66x = 1,942.41 × 515.17
  4. Step 4: Simplify right side
    1,295.66x = 1,000,668.78
  5. Step 5: Solve for x
    x = 1,000,668.78/1,295.66
  6. Step 6: Final answer
    x = 772.32

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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.