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Finding the Fourth Proportional to 917.08, 1,376.02 and 369.11

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Solution

The fourth proportional to 917.08, 1,376.02 and 369.11 is: 553.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.08 : 1,376.02 = 369.11 : x
  2. Step 2: Convert to fraction form
    917.08/1,376.02 = 369.11/x
  3. Step 3: Cross multiply
    917.08x = 1,376.02 × 369.11
  4. Step 4: Simplify right side
    917.08x = 507,902.74
  5. Step 5: Solve for x
    x = 507,902.74/917.08
  6. Step 6: Final answer
    x = 553.83

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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.