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Finding the Fourth Proportional to 517,408.10, 776,112.15 and 455,200.10

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Solution

The fourth proportional to 517,408.10, 776,112.15 and 455,200.10 is: 682,800.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,408.10 : 776,112.15 = 455,200.10 : x
  2. Step 2: Convert to fraction form
    517,408.10/776,112.15 = 455,200.10/x
  3. Step 3: Cross multiply
    517,408.10x = 776,112.15 × 455,200.10
  4. Step 4: Simplify right side
    517,408.10x = 353,286,328,291.22
  5. Step 5: Solve for x
    x = 353,286,328,291.22/517,408.10
  6. Step 6: Final answer
    x = 682,800.15

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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.