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Finding the Fourth Proportional to 686,774.88, 947,429.55 and 445,135.68

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Solution

The fourth proportional to 686,774.88, 947,429.55 and 445,135.68 is: 614,079.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,774.88 : 947,429.55 = 445,135.68 : x
  2. Step 2: Convert to fraction form
    686,774.88/947,429.55 = 445,135.68/x
  3. Step 3: Cross multiply
    686,774.88x = 947,429.55 × 445,135.68
  4. Step 4: Simplify right side
    686,774.88x = 421,734,696,991.34
  5. Step 5: Solve for x
    x = 421,734,696,991.34/686,774.88
  6. Step 6: Final answer
    x = 614,079.97

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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.