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Finding the Fourth Proportional to 619,143.92, 928,123.40 and 393,806.24

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Solution

The fourth proportional to 619,143.92, 928,123.40 and 393,806.24 is: 590,332.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,143.92 : 928,123.40 = 393,806.24 : x
  2. Step 2: Convert to fraction form
    619,143.92/928,123.40 = 393,806.24/x
  3. Step 3: Cross multiply
    619,143.92x = 928,123.40 × 393,806.24
  4. Step 4: Simplify right side
    619,143.92x = 365,500,786,410.02
  5. Step 5: Solve for x
    x = 365,500,786,410.02/619,143.92
  6. Step 6: Final answer
    x = 590,332.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.