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Finding the Fourth Proportional to 862.23, 1,190.31 and 583.93

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Solution

The fourth proportional to 862.23, 1,190.31 and 583.93 is: 806.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.23 : 1,190.31 = 583.93 : x
  2. Step 2: Convert to fraction form
    862.23/1,190.31 = 583.93/x
  3. Step 3: Cross multiply
    862.23x = 1,190.31 × 583.93
  4. Step 4: Simplify right side
    862.23x = 695,057.72
  5. Step 5: Solve for x
    x = 695,057.72/862.23
  6. Step 6: Final answer
    x = 806.12

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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.