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Finding the Fourth Proportional to 6,391,788.80, 9,587,683.20 and 5,384,019.20

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Solution

The fourth proportional to 6,391,788.80, 9,587,683.20 and 5,384,019.20 is: 8,076,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391,788.80 : 9,587,683.20 = 5,384,019.20 : x
  2. Step 2: Convert to fraction form
    6,391,788.80/9,587,683.20 = 5,384,019.20/x
  3. Step 3: Cross multiply
    6,391,788.80x = 9,587,683.20 × 5,384,019.20
  4. Step 4: Simplify right side
    6,391,788.80x = 51,620,270,432,317.44
  5. Step 5: Solve for x
    x = 51,620,270,432,317.44/6,391,788.80
  6. Step 6: Final answer
    x = 8,076,028.80

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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.