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Finding the Fourth Proportional to 613,480.77, 920,641.50 and 214,121.57

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Solution

The fourth proportional to 613,480.77, 920,641.50 and 214,121.57 is: 321,329.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,480.77 : 920,641.50 = 214,121.57 : x
  2. Step 2: Convert to fraction form
    613,480.77/920,641.50 = 214,121.57/x
  3. Step 3: Cross multiply
    613,480.77x = 920,641.50 × 214,121.57
  4. Step 4: Simplify right side
    613,480.77x = 197,129,198,783.95
  5. Step 5: Solve for x
    x = 197,129,198,783.95/613,480.77
  6. Step 6: Final answer
    x = 321,329.06

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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.