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Finding the Fourth Proportional to 4,978,897.20, 7,451,142.60 and 2,985,783.60

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Solution

The fourth proportional to 4,978,897.20, 7,451,142.60 and 2,985,783.60 is: 4,468,358.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978,897.20 : 7,451,142.60 = 2,985,783.60 : x
  2. Step 2: Convert to fraction form
    4,978,897.20/7,451,142.60 = 2,985,783.60/x
  3. Step 3: Cross multiply
    4,978,897.20x = 7,451,142.60 × 2,985,783.60
  4. Step 4: Simplify right side
    4,978,897.20x = 22,247,499,376,341.36
  5. Step 5: Solve for x
    x = 22,247,499,376,341.36/4,978,897.20
  6. Step 6: Final answer
    x = 4,468,358.85

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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.