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Finding the Fourth Proportional to 1,295.53, 1,943.28 and 515.50

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Solution

The fourth proportional to 1,295.53, 1,943.28 and 515.50 is: 773.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.53 : 1,943.28 = 515.50 : x
  2. Step 2: Convert to fraction form
    1,295.53/1,943.28 = 515.50/x
  3. Step 3: Cross multiply
    1,295.53x = 1,943.28 × 515.50
  4. Step 4: Simplify right side
    1,295.53x = 1,001,755.98
  5. Step 5: Solve for x
    x = 1,001,755.98/1,295.53
  6. Step 6: Final answer
    x = 773.24

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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.