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Finding the Fourth Proportional to 318,404.01, 439,397.37 and 191,079.66

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Solution

The fourth proportional to 318,404.01, 439,397.37 and 191,079.66 is: 263,689.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,404.01 : 439,397.37 = 191,079.66 : x
  2. Step 2: Convert to fraction form
    318,404.01/439,397.37 = 191,079.66/x
  3. Step 3: Cross multiply
    318,404.01x = 439,397.37 × 191,079.66
  4. Step 4: Simplify right side
    318,404.01x = 83,959,900,064.49
  5. Step 5: Solve for x
    x = 83,959,900,064.49/318,404.01
  6. Step 6: Final answer
    x = 263,689.83

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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.