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Finding the Fourth Proportional to 778.37, 1,073.66 and 463.42

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Solution

The fourth proportional to 778.37, 1,073.66 and 463.42 is: 639.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.37 : 1,073.66 = 463.42 : x
  2. Step 2: Convert to fraction form
    778.37/1,073.66 = 463.42/x
  3. Step 3: Cross multiply
    778.37x = 1,073.66 × 463.42
  4. Step 4: Simplify right side
    778.37x = 497,550.15
  5. Step 5: Solve for x
    x = 497,550.15/778.37
  6. Step 6: Final answer
    x = 639.22

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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.