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Finding the Fourth Proportional to 905.40, 1,249.07 and 573.66

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Solution

The fourth proportional to 905.40, 1,249.07 and 573.66 is: 791.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.40 : 1,249.07 = 573.66 : x
  2. Step 2: Convert to fraction form
    905.40/1,249.07 = 573.66/x
  3. Step 3: Cross multiply
    905.40x = 1,249.07 × 573.66
  4. Step 4: Simplify right side
    905.40x = 716,538.63
  5. Step 5: Solve for x
    x = 716,538.63/905.40
  6. Step 6: Final answer
    x = 791.41

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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.