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Finding the Fourth Proportional to 657,237.80, 985,856.70 and 257,891.60

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Solution

The fourth proportional to 657,237.80, 985,856.70 and 257,891.60 is: 386,837.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,237.80 : 985,856.70 = 257,891.60 : x
  2. Step 2: Convert to fraction form
    657,237.80/985,856.70 = 257,891.60/x
  3. Step 3: Cross multiply
    657,237.80x = 985,856.70 × 257,891.60
  4. Step 4: Simplify right side
    657,237.80x = 254,244,161,733.72
  5. Step 5: Solve for x
    x = 254,244,161,733.72/657,237.80
  6. Step 6: Final answer
    x = 386,837.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.