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Finding the Fourth Proportional to 413.43, 570.45 and 238.80

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Solution

The fourth proportional to 413.43, 570.45 and 238.80 is: 329.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.43 : 570.45 = 238.80 : x
  2. Step 2: Convert to fraction form
    413.43/570.45 = 238.80/x
  3. Step 3: Cross multiply
    413.43x = 570.45 × 238.80
  4. Step 4: Simplify right side
    413.43x = 136,223.46
  5. Step 5: Solve for x
    x = 136,223.46/413.43
  6. Step 6: Final answer
    x = 329.50

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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.