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Finding the Fourth Proportional to 1,398,623.94, 1,930,045.05 and 786,788.82

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Solution

The fourth proportional to 1,398,623.94, 1,930,045.05 and 786,788.82 is: 1,085,737.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,623.94 : 1,930,045.05 = 786,788.82 : x
  2. Step 2: Convert to fraction form
    1,398,623.94/1,930,045.05 = 786,788.82/x
  3. Step 3: Cross multiply
    1,398,623.94x = 1,930,045.05 × 786,788.82
  4. Step 4: Simplify right side
    1,398,623.94x = 1,518,537,867,436.34
  5. Step 5: Solve for x
    x = 1,518,537,867,436.34/1,398,623.94
  6. Step 6: Final answer
    x = 1,085,737.08

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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.