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Finding the Fourth Proportional to 517,419.60, 776,129.40 and 455,211.60

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Solution

The fourth proportional to 517,419.60, 776,129.40 and 455,211.60 is: 682,817.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,419.60 : 776,129.40 = 455,211.60 : x
  2. Step 2: Convert to fraction form
    517,419.60/776,129.40 = 455,211.60/x
  3. Step 3: Cross multiply
    517,419.60x = 776,129.40 × 455,211.60
  4. Step 4: Simplify right side
    517,419.60x = 353,303,105,981.04
  5. Step 5: Solve for x
    x = 353,303,105,981.04/517,419.60
  6. Step 6: Final answer
    x = 682,817.40

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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.