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Finding the Fourth Proportional to 693.20, 956.60 and 413.36

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Solution

The fourth proportional to 693.20, 956.60 and 413.36 is: 570.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.20 : 956.60 = 413.36 : x
  2. Step 2: Convert to fraction form
    693.20/956.60 = 413.36/x
  3. Step 3: Cross multiply
    693.20x = 956.60 × 413.36
  4. Step 4: Simplify right side
    693.20x = 395,420.18
  5. Step 5: Solve for x
    x = 395,420.18/693.20
  6. Step 6: Final answer
    x = 570.43

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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.