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Finding the Fourth Proportional to 865,353, 1,193,411.43 and 720,638.00

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Solution

The fourth proportional to 865,353, 1,193,411.43 and 720,638.00 is: 993,834.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,353 : 1,193,411.43 = 720,638.00 : x
  2. Step 2: Convert to fraction form
    865,353/1,193,411.43 = 720,638.00/x
  3. Step 3: Cross multiply
    865,353x = 1,193,411.43 × 720,638.00
  4. Step 4: Simplify right side
    865,353x = 860,017,620,125.28
  5. Step 5: Solve for x
    x = 860,017,620,125.28/865,353
  6. Step 6: Final answer
    x = 993,834.45

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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.