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Finding the Fourth Proportional to 449,115.72, 619,632.49 and 320,074.51

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Solution

The fourth proportional to 449,115.72, 619,632.49 and 320,074.51 is: 441,597.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,115.72 : 619,632.49 = 320,074.51 : x
  2. Step 2: Convert to fraction form
    449,115.72/619,632.49 = 320,074.51/x
  3. Step 3: Cross multiply
    449,115.72x = 619,632.49 × 320,074.51
  4. Step 4: Simplify right side
    449,115.72x = 198,328,565,616.83
  5. Step 5: Solve for x
    x = 198,328,565,616.83/449,115.72
  6. Step 6: Final answer
    x = 441,597.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.