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Finding the Fourth Proportional to 1,295.82, 1,943.68 and 515.79

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Solution

The fourth proportional to 1,295.82, 1,943.68 and 515.79 is: 773.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.82 : 1,943.68 = 515.79 : x
  2. Step 2: Convert to fraction form
    1,295.82/1,943.68 = 515.79/x
  3. Step 3: Cross multiply
    1,295.82x = 1,943.68 × 515.79
  4. Step 4: Simplify right side
    1,295.82x = 1,002,530.71
  5. Step 5: Solve for x
    x = 1,002,530.71/1,295.82
  6. Step 6: Final answer
    x = 773.67

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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.