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Finding the Fourth Proportional to 2,979,985.60, 4,469,978.40 and 985,441.60

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Solution

The fourth proportional to 2,979,985.60, 4,469,978.40 and 985,441.60 is: 1,478,162.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979,985.60 : 4,469,978.40 = 985,441.60 : x
  2. Step 2: Convert to fraction form
    2,979,985.60/4,469,978.40 = 985,441.60/x
  3. Step 3: Cross multiply
    2,979,985.60x = 4,469,978.40 × 985,441.60
  4. Step 4: Simplify right side
    2,979,985.60x = 4,404,902,666,461.44
  5. Step 5: Solve for x
    x = 4,404,902,666,461.44/2,979,985.60
  6. Step 6: Final answer
    x = 1,478,162.40

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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.