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Finding the Fourth Proportional to 621,115.02, 857,169.54 and 379,358.46

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Solution

The fourth proportional to 621,115.02, 857,169.54 and 379,358.46 is: 523,533.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,115.02 : 857,169.54 = 379,358.46 : x
  2. Step 2: Convert to fraction form
    621,115.02/857,169.54 = 379,358.46/x
  3. Step 3: Cross multiply
    621,115.02x = 857,169.54 × 379,358.46
  4. Step 4: Simplify right side
    621,115.02x = 325,174,516,653.31
  5. Step 5: Solve for x
    x = 325,174,516,653.31/621,115.02
  6. Step 6: Final answer
    x = 523,533.49

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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.