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Finding the Fourth Proportional to 832.15, 1,247.79 and 247.07

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Solution

The fourth proportional to 832.15, 1,247.79 and 247.07 is: 370.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.15 : 1,247.79 = 247.07 : x
  2. Step 2: Convert to fraction form
    832.15/1,247.79 = 247.07/x
  3. Step 3: Cross multiply
    832.15x = 1,247.79 × 247.07
  4. Step 4: Simplify right side
    832.15x = 308,297.86
  5. Step 5: Solve for x
    x = 308,297.86/832.15
  6. Step 6: Final answer
    x = 370.48

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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.