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Finding the Fourth Proportional to 413.90, 621.27 and 276.50

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Solution

The fourth proportional to 413.90, 621.27 and 276.50 is: 415.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.90 : 621.27 = 276.50 : x
  2. Step 2: Convert to fraction form
    413.90/621.27 = 276.50/x
  3. Step 3: Cross multiply
    413.90x = 621.27 × 276.50
  4. Step 4: Simplify right side
    413.90x = 171,781.16
  5. Step 5: Solve for x
    x = 171,781.16/413.90
  6. Step 6: Final answer
    x = 415.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.