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Finding the Fourth Proportional to 917.01, 1,375.11 and 369.09

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Solution

The fourth proportional to 917.01, 1,375.11 and 369.09 is: 553.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.01 : 1,375.11 = 369.09 : x
  2. Step 2: Convert to fraction form
    917.01/1,375.11 = 369.09/x
  3. Step 3: Cross multiply
    917.01x = 1,375.11 × 369.09
  4. Step 4: Simplify right side
    917.01x = 507,539.35
  5. Step 5: Solve for x
    x = 507,539.35/917.01
  6. Step 6: Final answer
    x = 553.47

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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.