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Finding the Fourth Proportional to 719,693.36, 993,171.96 and 397,423.76

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Solution

The fourth proportional to 719,693.36, 993,171.96 and 397,423.76 is: 548,442.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,693.36 : 993,171.96 = 397,423.76 : x
  2. Step 2: Convert to fraction form
    719,693.36/993,171.96 = 397,423.76/x
  3. Step 3: Cross multiply
    719,693.36x = 993,171.96 × 397,423.76
  4. Step 4: Simplify right side
    719,693.36x = 394,710,134,669.77
  5. Step 5: Solve for x
    x = 394,710,134,669.77/719,693.36
  6. Step 6: Final answer
    x = 548,442.10

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.