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Finding the Fourth Proportional to 1,640,982.89, 2,264,670.02 and 915,971.74

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Solution

The fourth proportional to 1,640,982.89, 2,264,670.02 and 915,971.74 is: 1,264,104.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640,982.89 : 2,264,670.02 = 915,971.74 : x
  2. Step 2: Convert to fraction form
    1,640,982.89/2,264,670.02 = 915,971.74/x
  3. Step 3: Cross multiply
    1,640,982.89x = 2,264,670.02 × 915,971.74
  4. Step 4: Simplify right side
    1,640,982.89x = 2,074,373,735,373.49
  5. Step 5: Solve for x
    x = 2,074,373,735,373.49/1,640,982.89
  6. Step 6: Final answer
    x = 1,264,104.42

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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.