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Finding the Fourth Proportional to 943.26, 1,415.02 and 395.38

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Solution

The fourth proportional to 943.26, 1,415.02 and 395.38 is: 593.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.26 : 1,415.02 = 395.38 : x
  2. Step 2: Convert to fraction form
    943.26/1,415.02 = 395.38/x
  3. Step 3: Cross multiply
    943.26x = 1,415.02 × 395.38
  4. Step 4: Simplify right side
    943.26x = 559,470.61
  5. Step 5: Solve for x
    x = 559,470.61/943.26
  6. Step 6: Final answer
    x = 593.12

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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.