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Finding the Fourth Proportional to 686,368.21, 947,186.49 and 376,270.25

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Solution

The fourth proportional to 686,368.21, 947,186.49 and 376,270.25 is: 519,252.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,368.21 : 947,186.49 = 376,270.25 : x
  2. Step 2: Convert to fraction form
    686,368.21/947,186.49 = 376,270.25/x
  3. Step 3: Cross multiply
    686,368.21x = 947,186.49 × 376,270.25
  4. Step 4: Simplify right side
    686,368.21x = 356,398,097,388.92
  5. Step 5: Solve for x
    x = 356,398,097,388.92/686,368.21
  6. Step 6: Final answer
    x = 519,252.05

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Double scale
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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.