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Finding the Fourth Proportional to 686,837.69, 947,892.76 and 381,012.67

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Solution

The fourth proportional to 686,837.69, 947,892.76 and 381,012.67 is: 525,828.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,837.69 : 947,892.76 = 381,012.67 : x
  2. Step 2: Convert to fraction form
    686,837.69/947,892.76 = 381,012.67/x
  3. Step 3: Cross multiply
    686,837.69x = 947,892.76 × 381,012.67
  4. Step 4: Simplify right side
    686,837.69x = 361,159,151,593.60
  5. Step 5: Solve for x
    x = 361,159,151,593.60/686,837.69
  6. Step 6: Final answer
    x = 525,828.97

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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.