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Finding the Fourth Proportional to 378,044.64, 521,777.16 and 217,008.56

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Solution

The fourth proportional to 378,044.64, 521,777.16 and 217,008.56 is: 299,515.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,044.64 : 521,777.16 = 217,008.56 : x
  2. Step 2: Convert to fraction form
    378,044.64/521,777.16 = 217,008.56/x
  3. Step 3: Cross multiply
    378,044.64x = 521,777.16 × 217,008.56
  4. Step 4: Simplify right side
    378,044.64x = 113,230,110,132.49
  5. Step 5: Solve for x
    x = 113,230,110,132.49/378,044.64
  6. Step 6: Final answer
    x = 299,515.18

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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.