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Finding the Fourth Proportional to 563.95, 778.56 and 354.17

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Solution

The fourth proportional to 563.95, 778.56 and 354.17 is: 488.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.95 : 778.56 = 354.17 : x
  2. Step 2: Convert to fraction form
    563.95/778.56 = 354.17/x
  3. Step 3: Cross multiply
    563.95x = 778.56 × 354.17
  4. Step 4: Simplify right side
    563.95x = 275,745.21
  5. Step 5: Solve for x
    x = 275,745.21/563.95
  6. Step 6: Final answer
    x = 488.95

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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.