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Finding the Fourth Proportional to 407,768.10, 611,652.15 and 348,719.10

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Solution

The fourth proportional to 407,768.10, 611,652.15 and 348,719.10 is: 523,078.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,768.10 : 611,652.15 = 348,719.10 : x
  2. Step 2: Convert to fraction form
    407,768.10/611,652.15 = 348,719.10/x
  3. Step 3: Cross multiply
    407,768.10x = 611,652.15 × 348,719.10
  4. Step 4: Simplify right side
    407,768.10x = 213,294,787,261.07
  5. Step 5: Solve for x
    x = 213,294,787,261.07/407,768.10
  6. Step 6: Final answer
    x = 523,078.65

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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.