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Finding the Fourth Proportional to 547,791.20, 821,686.80 and 454,479.20

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Solution

The fourth proportional to 547,791.20, 821,686.80 and 454,479.20 is: 681,718.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,791.20 : 821,686.80 = 454,479.20 : x
  2. Step 2: Convert to fraction form
    547,791.20/821,686.80 = 454,479.20/x
  3. Step 3: Cross multiply
    547,791.20x = 821,686.80 × 454,479.20
  4. Step 4: Simplify right side
    547,791.20x = 373,439,559,514.56
  5. Step 5: Solve for x
    x = 373,439,559,514.56/547,791.20
  6. Step 6: Final answer
    x = 681,718.80

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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.