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Finding the Fourth Proportional to 778.17, 1,073.79 and 446.58

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Solution

The fourth proportional to 778.17, 1,073.79 and 446.58 is: 616.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.17 : 1,073.79 = 446.58 : x
  2. Step 2: Convert to fraction form
    778.17/1,073.79 = 446.58/x
  3. Step 3: Cross multiply
    778.17x = 1,073.79 × 446.58
  4. Step 4: Simplify right side
    778.17x = 479,533.14
  5. Step 5: Solve for x
    x = 479,533.14/778.17
  6. Step 6: Final answer
    x = 616.23

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.