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Finding the Fourth Proportional to 773.98, 1,065.81 and 656.13

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Solution

The fourth proportional to 773.98, 1,065.81 and 656.13 is: 903.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.98 : 1,065.81 = 656.13 : x
  2. Step 2: Convert to fraction form
    773.98/1,065.81 = 656.13/x
  3. Step 3: Cross multiply
    773.98x = 1,065.81 × 656.13
  4. Step 4: Simplify right side
    773.98x = 699,309.92
  5. Step 5: Solve for x
    x = 699,309.92/773.98
  6. Step 6: Final answer
    x = 903.52

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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.