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Finding the Fourth Proportional to 1,063.30, 1,591 and 788.92

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Solution

The fourth proportional to 1,063.30, 1,591 and 788.92 is: 1,180.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,063.30 : 1,591 = 788.92 : x
  2. Step 2: Convert to fraction form
    1,063.30/1,591 = 788.92/x
  3. Step 3: Cross multiply
    1,063.30x = 1,591 × 788.92
  4. Step 4: Simplify right side
    1,063.30x = 1,255,171.72
  5. Step 5: Solve for x
    x = 1,255,171.72/1,063.30
  6. Step 6: Final answer
    x = 1,180.45

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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.