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Finding the Fourth Proportional to 276.07, 413.87 and 139.04

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Solution

The fourth proportional to 276.07, 413.87 and 139.04 is: 208.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.07 : 413.87 = 139.04 : x
  2. Step 2: Convert to fraction form
    276.07/413.87 = 139.04/x
  3. Step 3: Cross multiply
    276.07x = 413.87 × 139.04
  4. Step 4: Simplify right side
    276.07x = 57,544.48
  5. Step 5: Solve for x
    x = 57,544.48/276.07
  6. Step 6: Final answer
    x = 208.45

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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.