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Finding the Fourth Proportional to 725.77, 1,001.56 and 394.19

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Solution

The fourth proportional to 725.77, 1,001.56 and 394.19 is: 543.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.77 : 1,001.56 = 394.19 : x
  2. Step 2: Convert to fraction form
    725.77/1,001.56 = 394.19/x
  3. Step 3: Cross multiply
    725.77x = 1,001.56 × 394.19
  4. Step 4: Simplify right side
    725.77x = 394,804.94
  5. Step 5: Solve for x
    x = 394,804.94/725.77
  6. Step 6: Final answer
    x = 543.98

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1.5x scale

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.