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Finding the Fourth Proportional to 950.86, 1,423.32 and 720.61

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Solution

The fourth proportional to 950.86, 1,423.32 and 720.61 is: 1,078.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.86 : 1,423.32 = 720.61 : x
  2. Step 2: Convert to fraction form
    950.86/1,423.32 = 720.61/x
  3. Step 3: Cross multiply
    950.86x = 1,423.32 × 720.61
  4. Step 4: Simplify right side
    950.86x = 1,025,658.63
  5. Step 5: Solve for x
    x = 1,025,658.63/950.86
  6. Step 6: Final answer
    x = 1,078.66

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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.