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Finding the Fourth Proportional to 657,611.78, 907,504.20 and 355,805.78

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Solution

The fourth proportional to 657,611.78, 907,504.20 and 355,805.78 is: 491,011.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,611.78 : 907,504.20 = 355,805.78 : x
  2. Step 2: Convert to fraction form
    657,611.78/907,504.20 = 355,805.78/x
  3. Step 3: Cross multiply
    657,611.78x = 907,504.20 × 355,805.78
  4. Step 4: Simplify right side
    657,611.78x = 322,895,239,734.28
  5. Step 5: Solve for x
    x = 322,895,239,734.28/657,611.78
  6. Step 6: Final answer
    x = 491,011.95

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Similar ratio
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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.