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Finding the Fourth Proportional to 788.06, 1,086.60 and 539.52

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Solution

The fourth proportional to 788.06, 1,086.60 and 539.52 is: 743.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.06 : 1,086.60 = 539.52 : x
  2. Step 2: Convert to fraction form
    788.06/1,086.60 = 539.52/x
  3. Step 3: Cross multiply
    788.06x = 1,086.60 × 539.52
  4. Step 4: Simplify right side
    788.06x = 586,242.43
  5. Step 5: Solve for x
    x = 586,242.43/788.06
  6. Step 6: Final answer
    x = 743.91

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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.