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Finding the Fourth Proportional to 909.86, 1,255.07 and 573.22

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Solution

The fourth proportional to 909.86, 1,255.07 and 573.22 is: 790.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.86 : 1,255.07 = 573.22 : x
  2. Step 2: Convert to fraction form
    909.86/1,255.07 = 573.22/x
  3. Step 3: Cross multiply
    909.86x = 1,255.07 × 573.22
  4. Step 4: Simplify right side
    909.86x = 719,431.23
  5. Step 5: Solve for x
    x = 719,431.23/909.86
  6. Step 6: Final answer
    x = 790.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.