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Finding the Fourth Proportional to 5,317,705.80, 7,974,885.56 and 1,722,638.64

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Solution

The fourth proportional to 5,317,705.80, 7,974,885.56 and 1,722,638.64 is: 2,583,415.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,317,705.80 : 7,974,885.56 = 1,722,638.64 : x
  2. Step 2: Convert to fraction form
    5,317,705.80/7,974,885.56 = 1,722,638.64/x
  3. Step 3: Cross multiply
    5,317,705.80x = 7,974,885.56 × 1,722,638.64
  4. Step 4: Simplify right side
    5,317,705.80x = 13,737,846,015,234.04
  5. Step 5: Solve for x
    x = 13,737,846,015,234.04/5,317,705.80
  6. Step 6: Final answer
    x = 2,583,415.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.