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Finding the Fourth Proportional to 4,978,695.60, 7,471,729.80 and 1,989,025.20

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Solution

The fourth proportional to 4,978,695.60, 7,471,729.80 and 1,989,025.20 is: 2,985,010.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978,695.60 : 7,471,729.80 = 1,989,025.20 : x
  2. Step 2: Convert to fraction form
    4,978,695.60/7,471,729.80 = 1,989,025.20/x
  3. Step 3: Cross multiply
    4,978,695.60x = 7,471,729.80 × 1,989,025.20
  4. Step 4: Simplify right side
    4,978,695.60x = 14,861,458,859,790.96
  5. Step 5: Solve for x
    x = 14,861,458,859,790.96/4,978,695.60
  6. Step 6: Final answer
    x = 2,985,010.54

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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.