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Finding the Fourth Proportional to 1,188.76, 1,783.92 and 539.56

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Solution

The fourth proportional to 1,188.76, 1,783.92 and 539.56 is: 809.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.76 : 1,783.92 = 539.56 : x
  2. Step 2: Convert to fraction form
    1,188.76/1,783.92 = 539.56/x
  3. Step 3: Cross multiply
    1,188.76x = 1,783.92 × 539.56
  4. Step 4: Simplify right side
    1,188.76x = 962,531.88
  5. Step 5: Solve for x
    x = 962,531.88/1,188.76
  6. Step 6: Final answer
    x = 809.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.