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Finding the Fourth Proportional to 789.32, 1,088.18 and 614.92

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Solution

The fourth proportional to 789.32, 1,088.18 and 614.92 is: 847.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.32 : 1,088.18 = 614.92 : x
  2. Step 2: Convert to fraction form
    789.32/1,088.18 = 614.92/x
  3. Step 3: Cross multiply
    789.32x = 1,088.18 × 614.92
  4. Step 4: Simplify right side
    789.32x = 669,143.65
  5. Step 5: Solve for x
    x = 669,143.65/789.32
  6. Step 6: Final answer
    x = 847.75

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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.