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Finding the Fourth Proportional to 1,214,610, 1,676,161.92 and 678,066

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Solution

The fourth proportional to 1,214,610, 1,676,161.92 and 678,066 is: 935,731.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214,610 : 1,676,161.92 = 678,066 : x
  2. Step 2: Convert to fraction form
    1,214,610/1,676,161.92 = 678,066/x
  3. Step 3: Cross multiply
    1,214,610x = 1,676,161.92 × 678,066
  4. Step 4: Simplify right side
    1,214,610x = 1,136,548,408,446.72
  5. Step 5: Solve for x
    x = 1,136,548,408,446.72/1,214,610
  6. Step 6: Final answer
    x = 935,731.15

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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.