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Finding the Fourth Proportional to 413.57, 621.63 and 277.49

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Solution

The fourth proportional to 413.57, 621.63 and 277.49 is: 417.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.57 : 621.63 = 277.49 : x
  2. Step 2: Convert to fraction form
    413.57/621.63 = 277.49/x
  3. Step 3: Cross multiply
    413.57x = 621.63 × 277.49
  4. Step 4: Simplify right side
    413.57x = 172,496.11
  5. Step 5: Solve for x
    x = 172,496.11/413.57
  6. Step 6: Final answer
    x = 417.09

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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.