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Finding the Fourth Proportional to 366,979,420.40, 550,469,130.60 and 203,720,745.20

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Solution

The fourth proportional to 366,979,420.40, 550,469,130.60 and 203,720,745.20 is: 305,581,117.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    366,979,420.40 : 550,469,130.60 = 203,720,745.20 : x
  2. Step 2: Convert to fraction form
    366,979,420.40/550,469,130.60 = 203,720,745.20/x
  3. Step 3: Cross multiply
    366,979,420.40x = 550,469,130.60 × 203,720,745.20
  4. Step 4: Simplify right side
    366,979,420.40x = 112,141,981,495,428,128
  5. Step 5: Solve for x
    x = 112,141,981,495,428,128/366,979,420.40
  6. Step 6: Final answer
    x = 305,581,117.80

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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.