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Finding the Fourth Proportional to 5,581,985.60, 8,372,978.40 and 1,379,489.60

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Solution

The fourth proportional to 5,581,985.60, 8,372,978.40 and 1,379,489.60 is: 2,069,234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,581,985.60 : 8,372,978.40 = 1,379,489.60 : x
  2. Step 2: Convert to fraction form
    5,581,985.60/8,372,978.40 = 1,379,489.60/x
  3. Step 3: Cross multiply
    5,581,985.60x = 8,372,978.40 × 1,379,489.60
  4. Step 4: Simplify right side
    5,581,985.60x = 11,550,436,623,824.64
  5. Step 5: Solve for x
    x = 11,550,436,623,824.64/5,581,985.60
  6. Step 6: Final answer
    x = 2,069,234.40

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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.