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Finding the Fourth Proportional to 788.94, 1,180.44 and 545.94

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Solution

The fourth proportional to 788.94, 1,180.44 and 545.94 is: 816.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.94 : 1,180.44 = 545.94 : x
  2. Step 2: Convert to fraction form
    788.94/1,180.44 = 545.94/x
  3. Step 3: Cross multiply
    788.94x = 1,180.44 × 545.94
  4. Step 4: Simplify right side
    788.94x = 644,449.41
  5. Step 5: Solve for x
    x = 644,449.41/788.94
  6. Step 6: Final answer
    x = 816.85

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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.