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Finding the Fourth Proportional to 657,911.73, 907,920.90 and 356,105.73

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Solution

The fourth proportional to 657,911.73, 907,920.90 and 356,105.73 is: 491,427.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,911.73 : 907,920.90 = 356,105.73 : x
  2. Step 2: Convert to fraction form
    657,911.73/907,920.90 = 356,105.73/x
  3. Step 3: Cross multiply
    657,911.73x = 907,920.90 × 356,105.73
  4. Step 4: Simplify right side
    657,911.73x = 323,315,834,876.76
  5. Step 5: Solve for x
    x = 323,315,834,876.76/657,911.73
  6. Step 6: Final answer
    x = 491,427.38

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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.