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Finding the Fourth Proportional to 713.92, 1,070.20 and 226.64

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Solution

The fourth proportional to 713.92, 1,070.20 and 226.64 is: 339.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.92 : 1,070.20 = 226.64 : x
  2. Step 2: Convert to fraction form
    713.92/1,070.20 = 226.64/x
  3. Step 3: Cross multiply
    713.92x = 1,070.20 × 226.64
  4. Step 4: Simplify right side
    713.92x = 242,550.13
  5. Step 5: Solve for x
    x = 242,550.13/713.92
  6. Step 6: Final answer
    x = 339.74

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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.