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Finding the Fourth Proportional to 387,686.52, 535,007.73 and 215,600.73

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Solution

The fourth proportional to 387,686.52, 535,007.73 and 215,600.73 is: 297,529.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,686.52 : 535,007.73 = 215,600.73 : x
  2. Step 2: Convert to fraction form
    387,686.52/535,007.73 = 215,600.73/x
  3. Step 3: Cross multiply
    387,686.52x = 535,007.73 × 215,600.73
  4. Step 4: Simplify right side
    387,686.52x = 115,348,057,143.64
  5. Step 5: Solve for x
    x = 115,348,057,143.64/387,686.52
  6. Step 6: Final answer
    x = 297,529.19

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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.