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Finding the Fourth Proportional to 548,767.80, 821,985.30 and 455,455.80

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Solution

The fourth proportional to 548,767.80, 821,985.30 and 455,455.80 is: 682,215.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,767.80 : 821,985.30 = 455,455.80 : x
  2. Step 2: Convert to fraction form
    548,767.80/821,985.30 = 455,455.80/x
  3. Step 3: Cross multiply
    548,767.80x = 821,985.30 × 455,455.80
  4. Step 4: Simplify right side
    548,767.80x = 374,377,972,399.74
  5. Step 5: Solve for x
    x = 374,377,972,399.74/548,767.80
  6. Step 6: Final answer
    x = 682,215.63

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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.