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Finding the Fourth Proportional to 397,553.85, 547,239.26 and 346,478.78

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Solution

The fourth proportional to 397,553.85, 547,239.26 and 346,478.78 is: 476,933.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,553.85 : 547,239.26 = 346,478.78 : x
  2. Step 2: Convert to fraction form
    397,553.85/547,239.26 = 346,478.78/x
  3. Step 3: Cross multiply
    397,553.85x = 547,239.26 × 346,478.78
  4. Step 4: Simplify right side
    397,553.85x = 189,606,793,407.20
  5. Step 5: Solve for x
    x = 189,606,793,407.20/397,553.85
  6. Step 6: Final answer
    x = 476,933.61

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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.