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Finding the Fourth Proportional to 290,313,957.20, 435,187,500.60 and 259,702,955.60

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Solution

The fourth proportional to 290,313,957.20, 435,187,500.60 and 259,702,955.60 is: 389,300,883.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,313,957.20 : 435,187,500.60 = 259,702,955.60 : x
  2. Step 2: Convert to fraction form
    290,313,957.20/435,187,500.60 = 259,702,955.60/x
  3. Step 3: Cross multiply
    290,313,957.20x = 435,187,500.60 × 259,702,955.60
  4. Step 4: Simplify right side
    290,313,957.20x = 113,019,480,145,996,784
  5. Step 5: Solve for x
    x = 113,019,480,145,996,784/290,313,957.20
  6. Step 6: Final answer
    x = 389,300,883.90

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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.