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Finding the Fourth Proportional to 657,496.80, 986,245.20 and 648,639.45

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Solution

The fourth proportional to 657,496.80, 986,245.20 and 648,639.45 is: 972,959.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,496.80 : 986,245.20 = 648,639.45 : x
  2. Step 2: Convert to fraction form
    657,496.80/986,245.20 = 648,639.45/x
  3. Step 3: Cross multiply
    657,496.80x = 986,245.20 × 648,639.45
  4. Step 4: Simplify right side
    657,496.80x = 639,717,544,093.14
  5. Step 5: Solve for x
    x = 639,717,544,093.14/657,496.80
  6. Step 6: Final answer
    x = 972,959.18

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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.