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Finding the Fourth Proportional to 413.18, 615.46 and 394.46

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Solution

The fourth proportional to 413.18, 615.46 and 394.46 is: 587.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.18 : 615.46 = 394.46 : x
  2. Step 2: Convert to fraction form
    413.18/615.46 = 394.46/x
  3. Step 3: Cross multiply
    413.18x = 615.46 × 394.46
  4. Step 4: Simplify right side
    413.18x = 242,774.35
  5. Step 5: Solve for x
    x = 242,774.35/413.18
  6. Step 6: Final answer
    x = 587.58

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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.