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Finding the Fourth Proportional to 2,657,563.60, 3,986,978.96 and 860,447.61

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Solution

The fourth proportional to 2,657,563.60, 3,986,978.96 and 860,447.61 is: 1,290,876.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,657,563.60 : 3,986,978.96 = 860,447.61 : x
  2. Step 2: Convert to fraction form
    2,657,563.60/3,986,978.96 = 860,447.61/x
  3. Step 3: Cross multiply
    2,657,563.60x = 3,986,978.96 × 860,447.61
  4. Step 4: Simplify right side
    2,657,563.60x = 3,430,586,519,403.40
  5. Step 5: Solve for x
    x = 3,430,586,519,403.40/2,657,563.60
  6. Step 6: Final answer
    x = 1,290,876.54

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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.