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Finding the Fourth Proportional to 788.23, 1,087.18 and 539.29

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Solution

The fourth proportional to 788.23, 1,087.18 and 539.29 is: 743.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.23 : 1,087.18 = 539.29 : x
  2. Step 2: Convert to fraction form
    788.23/1,087.18 = 539.29/x
  3. Step 3: Cross multiply
    788.23x = 1,087.18 × 539.29
  4. Step 4: Simplify right side
    788.23x = 586,305.30
  5. Step 5: Solve for x
    x = 586,305.30/788.23
  6. Step 6: Final answer
    x = 743.83

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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.