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Finding the Fourth Proportional to 451,021.88, 622,174.23 and 278,884.82

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Solution

The fourth proportional to 451,021.88, 622,174.23 and 278,884.82 is: 384,715.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,021.88 : 622,174.23 = 278,884.82 : x
  2. Step 2: Convert to fraction form
    451,021.88/622,174.23 = 278,884.82/x
  3. Step 3: Cross multiply
    451,021.88x = 622,174.23 × 278,884.82
  4. Step 4: Simplify right side
    451,021.88x = 173,514,948,142.19
  5. Step 5: Solve for x
    x = 173,514,948,142.19/451,021.88
  6. Step 6: Final answer
    x = 384,715.15

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1.5x scale

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.