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Finding the Fourth Proportional to 1,214,616, 1,676,170.20 and 678,072

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Solution

The fourth proportional to 1,214,616, 1,676,170.20 and 678,072 is: 935,739.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214,616 : 1,676,170.20 = 678,072 : x
  2. Step 2: Convert to fraction form
    1,214,616/1,676,170.20 = 678,072/x
  3. Step 3: Cross multiply
    1,214,616x = 1,676,170.20 × 678,072
  4. Step 4: Simplify right side
    1,214,616x = 1,136,564,079,854.40
  5. Step 5: Solve for x
    x = 1,136,564,079,854.40/1,214,616
  6. Step 6: Final answer
    x = 935,739.43

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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.