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Finding the Fourth Proportional to 743.44, 1,025.92 and 477.60

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Solution

The fourth proportional to 743.44, 1,025.92 and 477.60 is: 659.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.44 : 1,025.92 = 477.60 : x
  2. Step 2: Convert to fraction form
    743.44/1,025.92 = 477.60/x
  3. Step 3: Cross multiply
    743.44x = 1,025.92 × 477.60
  4. Step 4: Simplify right side
    743.44x = 489,979.39
  5. Step 5: Solve for x
    x = 489,979.39/743.44
  6. Step 6: Final answer
    x = 659.07

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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.