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Finding the Fourth Proportional to 943.03, 1,415.18 and 387.83

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Solution

The fourth proportional to 943.03, 1,415.18 and 387.83 is: 582.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.03 : 1,415.18 = 387.83 : x
  2. Step 2: Convert to fraction form
    943.03/1,415.18 = 387.83/x
  3. Step 3: Cross multiply
    943.03x = 1,415.18 × 387.83
  4. Step 4: Simplify right side
    943.03x = 548,851.59
  5. Step 5: Solve for x
    x = 548,851.59/943.03
  6. Step 6: Final answer
    x = 582.01

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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.