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Finding the Fourth Proportional to 1,214,931, 1,676,604.84 and 678,387

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Solution

The fourth proportional to 1,214,931, 1,676,604.84 and 678,387 is: 936,174.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214,931 : 1,676,604.84 = 678,387 : x
  2. Step 2: Convert to fraction form
    1,214,931/1,676,604.84 = 678,387/x
  3. Step 3: Cross multiply
    1,214,931x = 1,676,604.84 × 678,387
  4. Step 4: Simplify right side
    1,214,931x = 1,137,386,927,593.08
  5. Step 5: Solve for x
    x = 1,137,386,927,593.08/1,214,931
  6. Step 6: Final answer
    x = 936,174.09

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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.