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Finding the Fourth Proportional to 713,781.02, 985,253.36 and 638,112.97

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Solution

The fourth proportional to 713,781.02, 985,253.36 and 638,112.97 is: 880,806.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,781.02 : 985,253.36 = 638,112.97 : x
  2. Step 2: Convert to fraction form
    713,781.02/985,253.36 = 638,112.97/x
  3. Step 3: Cross multiply
    713,781.02x = 985,253.36 × 638,112.97
  4. Step 4: Simplify right side
    713,781.02x = 628,702,948,425.89
  5. Step 5: Solve for x
    x = 628,702,948,425.89/713,781.02
  6. Step 6: Final answer
    x = 880,806.48

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.