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Finding the Fourth Proportional to 563.66, 778.77 and 438.12

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Solution

The fourth proportional to 563.66, 778.77 and 438.12 is: 605.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.66 : 778.77 = 438.12 : x
  2. Step 2: Convert to fraction form
    563.66/778.77 = 438.12/x
  3. Step 3: Cross multiply
    563.66x = 778.77 × 438.12
  4. Step 4: Simplify right side
    563.66x = 341,194.71
  5. Step 5: Solve for x
    x = 341,194.71/563.66
  6. Step 6: Final answer
    x = 605.33

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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.