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Finding the Fourth Proportional to 548,379.30, 821,402.55 and 455,067.30

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Solution

The fourth proportional to 548,379.30, 821,402.55 and 455,067.30 is: 681,633.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,379.30 : 821,402.55 = 455,067.30 : x
  2. Step 2: Convert to fraction form
    548,379.30/821,402.55 = 455,067.30/x
  3. Step 3: Cross multiply
    548,379.30x = 821,402.55 × 455,067.30
  4. Step 4: Simplify right side
    548,379.30x = 373,793,440,641.62
  5. Step 5: Solve for x
    x = 373,793,440,641.62/548,379.30
  6. Step 6: Final answer
    x = 681,633.02

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1.5x scale

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.