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Finding the Fourth Proportional to 639,383.10, 881,806.95 and 384,686.70

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Solution

The fourth proportional to 639,383.10, 881,806.95 and 384,686.70 is: 530,541.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,383.10 : 881,806.95 = 384,686.70 : x
  2. Step 2: Convert to fraction form
    639,383.10/881,806.95 = 384,686.70/x
  3. Step 3: Cross multiply
    639,383.10x = 881,806.95 × 384,686.70
  4. Step 4: Simplify right side
    639,383.10x = 339,219,405,632.57
  5. Step 5: Solve for x
    x = 339,219,405,632.57/639,383.10
  6. Step 6: Final answer
    x = 530,541.71

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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.