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Finding the Fourth Proportional to 387,529.38, 534,840.65 and 217,763.52

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Solution

The fourth proportional to 387,529.38, 534,840.65 and 217,763.52 is: 300,541.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,529.38 : 534,840.65 = 217,763.52 : x
  2. Step 2: Convert to fraction form
    387,529.38/534,840.65 = 217,763.52/x
  3. Step 3: Cross multiply
    387,529.38x = 534,840.65 × 217,763.52
  4. Step 4: Simplify right side
    387,529.38x = 116,468,780,453.29
  5. Step 5: Solve for x
    x = 116,468,780,453.29/387,529.38
  6. Step 6: Final answer
    x = 300,541.81

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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.