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Finding the Fourth Proportional to 686,848.40, 947,850.22 and 385,042.40

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Solution

The fourth proportional to 686,848.40, 947,850.22 and 385,042.40 is: 531,358.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,848.40 : 947,850.22 = 385,042.40 : x
  2. Step 2: Convert to fraction form
    686,848.40/947,850.22 = 385,042.40/x
  3. Step 3: Cross multiply
    686,848.40x = 947,850.22 × 385,042.40
  4. Step 4: Simplify right side
    686,848.40x = 364,962,523,549.33
  5. Step 5: Solve for x
    x = 364,962,523,549.33/686,848.40
  6. Step 6: Final answer
    x = 531,358.19

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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.