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Finding the Fourth Proportional to 917.37, 1,375.83 and 369.39

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Solution

The fourth proportional to 917.37, 1,375.83 and 369.39 is: 553.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.37 : 1,375.83 = 369.39 : x
  2. Step 2: Convert to fraction form
    917.37/1,375.83 = 369.39/x
  3. Step 3: Cross multiply
    917.37x = 1,375.83 × 369.39
  4. Step 4: Simplify right side
    917.37x = 508,217.84
  5. Step 5: Solve for x
    x = 508,217.84/917.37
  6. Step 6: Final answer
    x = 553.99

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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.