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Finding the Fourth Proportional to 290,323,619.20, 435,485,428.80 and 218,660,003.20

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Solution

The fourth proportional to 290,323,619.20, 435,485,428.80 and 218,660,003.20 is: 327,990,004.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,323,619.20 : 435,485,428.80 = 218,660,003.20 : x
  2. Step 2: Convert to fraction form
    290,323,619.20/435,485,428.80 = 218,660,003.20/x
  3. Step 3: Cross multiply
    290,323,619.20x = 435,485,428.80 × 218,660,003.20
  4. Step 4: Simplify right side
    290,323,619.20x = 95,223,245,254,961,376
  5. Step 5: Solve for x
    x = 95,223,245,254,961,376/290,323,619.20
  6. Step 6: Final answer
    x = 327,990,004.80

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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.