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Finding the Fourth Proportional to 575.45, 862.56 and 413.85

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Solution

The fourth proportional to 575.45, 862.56 and 413.85 is: 620.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.45 : 862.56 = 413.85 : x
  2. Step 2: Convert to fraction form
    575.45/862.56 = 413.85/x
  3. Step 3: Cross multiply
    575.45x = 862.56 × 413.85
  4. Step 4: Simplify right side
    575.45x = 356,970.46
  5. Step 5: Solve for x
    x = 356,970.46/575.45
  6. Step 6: Final answer
    x = 620.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.