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Finding the Fourth Proportional to 992.90, 1,370.11 and 573.39

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Solution

The fourth proportional to 992.90, 1,370.11 and 573.39 is: 791.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.90 : 1,370.11 = 573.39 : x
  2. Step 2: Convert to fraction form
    992.90/1,370.11 = 573.39/x
  3. Step 3: Cross multiply
    992.90x = 1,370.11 × 573.39
  4. Step 4: Simplify right side
    992.90x = 785,605.94
  5. Step 5: Solve for x
    x = 785,605.94/992.90
  6. Step 6: Final answer
    x = 791.22

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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.