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Finding the Fourth Proportional to 553.82, 763.41 and 413.72

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Solution

The fourth proportional to 553.82, 763.41 and 413.72 is: 570.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.82 : 763.41 = 413.72 : x
  2. Step 2: Convert to fraction form
    553.82/763.41 = 413.72/x
  3. Step 3: Cross multiply
    553.82x = 763.41 × 413.72
  4. Step 4: Simplify right side
    553.82x = 315,838.58
  5. Step 5: Solve for x
    x = 315,838.58/553.82
  6. Step 6: Final answer
    x = 570.30

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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.