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Finding the Fourth Proportional to 639,667.80, 954,339.48 and 616,408.92

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Solution

The fourth proportional to 639,667.80, 954,339.48 and 616,408.92 is: 919,638.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,667.80 : 954,339.48 = 616,408.92 : x
  2. Step 2: Convert to fraction form
    639,667.80/954,339.48 = 616,408.92/x
  3. Step 3: Cross multiply
    639,667.80x = 954,339.48 × 616,408.92
  4. Step 4: Simplify right side
    639,667.80x = 588,263,368,180.16
  5. Step 5: Solve for x
    x = 588,263,368,180.16/639,667.80
  6. Step 6: Final answer
    x = 919,638.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.