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Finding the Fourth Proportional to 639,219.87, 957,916.13 and 469,408.23

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Solution

The fourth proportional to 639,219.87, 957,916.13 and 469,408.23 is: 703,441.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,219.87 : 957,916.13 = 469,408.23 : x
  2. Step 2: Convert to fraction form
    639,219.87/957,916.13 = 469,408.23/x
  3. Step 3: Cross multiply
    639,219.87x = 957,916.13 × 469,408.23
  4. Step 4: Simplify right side
    639,219.87x = 449,653,712,724.71
  5. Step 5: Solve for x
    x = 449,653,712,724.71/639,219.87
  6. Step 6: Final answer
    x = 703,441.39

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Double scale
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Similar ratio
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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.