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Finding the Fourth Proportional to 621,452.96, 857,649.97 and 379,781.76

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Solution

The fourth proportional to 621,452.96, 857,649.97 and 379,781.76 is: 524,126.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,452.96 : 857,649.97 = 379,781.76 : x
  2. Step 2: Convert to fraction form
    621,452.96/857,649.97 = 379,781.76/x
  3. Step 3: Cross multiply
    621,452.96x = 857,649.97 × 379,781.76
  4. Step 4: Simplify right side
    621,452.96x = 325,719,818,761.46
  5. Step 5: Solve for x
    x = 325,719,818,761.46/621,452.96
  6. Step 6: Final answer
    x = 524,126.27

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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.