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Finding the Fourth Proportional to 413.44, 616.32 and 395.20

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Solution

The fourth proportional to 413.44, 616.32 and 395.20 is: 589.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.44 : 616.32 = 395.20 : x
  2. Step 2: Convert to fraction form
    413.44/616.32 = 395.20/x
  3. Step 3: Cross multiply
    413.44x = 616.32 × 395.20
  4. Step 4: Simplify right side
    413.44x = 243,569.66
  5. Step 5: Solve for x
    x = 243,569.66/413.44
  6. Step 6: Final answer
    x = 589.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.