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Finding the Fourth Proportional to 413.18, 569.40 and 394.28

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Solution

The fourth proportional to 413.18, 569.40 and 394.28 is: 543.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.18 : 569.40 = 394.28 : x
  2. Step 2: Convert to fraction form
    413.18/569.40 = 394.28/x
  3. Step 3: Cross multiply
    413.18x = 569.40 × 394.28
  4. Step 4: Simplify right side
    413.18x = 224,503.03
  5. Step 5: Solve for x
    x = 224,503.03/413.18
  6. Step 6: Final answer
    x = 543.35

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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.