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Finding the Fourth Proportional to 943.37, 1,415.15 and 285.20

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Solution

The fourth proportional to 943.37, 1,415.15 and 285.20 is: 427.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.37 : 1,415.15 = 285.20 : x
  2. Step 2: Convert to fraction form
    943.37/1,415.15 = 285.20/x
  3. Step 3: Cross multiply
    943.37x = 1,415.15 × 285.20
  4. Step 4: Simplify right side
    943.37x = 403,599.35
  5. Step 5: Solve for x
    x = 403,599.35/943.37
  6. Step 6: Final answer
    x = 427.83

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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.