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Finding the Fourth Proportional to 789.23, 1,182.49 and 557.67

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Solution

The fourth proportional to 789.23, 1,182.49 and 557.67 is: 835.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.23 : 1,182.49 = 557.67 : x
  2. Step 2: Convert to fraction form
    789.23/1,182.49 = 557.67/x
  3. Step 3: Cross multiply
    789.23x = 1,182.49 × 557.67
  4. Step 4: Simplify right side
    789.23x = 659,434.42
  5. Step 5: Solve for x
    x = 659,434.42/789.23
  6. Step 6: Final answer
    x = 835.55

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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.