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Finding the Fourth Proportional to 943.56, 1,415.27 and 423.59

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Solution

The fourth proportional to 943.56, 1,415.27 and 423.59 is: 635.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.56 : 1,415.27 = 423.59 : x
  2. Step 2: Convert to fraction form
    943.56/1,415.27 = 423.59/x
  3. Step 3: Cross multiply
    943.56x = 1,415.27 × 423.59
  4. Step 4: Simplify right side
    943.56x = 599,485.03
  5. Step 5: Solve for x
    x = 599,485.03/943.56
  6. Step 6: Final answer
    x = 635.34

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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.