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Finding the Fourth Proportional to 419,906,430.40, 629,859,645.60 and 368,888,094.40

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Solution

The fourth proportional to 419,906,430.40, 629,859,645.60 and 368,888,094.40 is: 553,332,141.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,906,430.40 : 629,859,645.60 = 368,888,094.40 : x
  2. Step 2: Convert to fraction form
    419,906,430.40/629,859,645.60 = 368,888,094.40/x
  3. Step 3: Cross multiply
    419,906,430.40x = 629,859,645.60 × 368,888,094.40
  4. Step 4: Simplify right side
    419,906,430.40x = 232,347,724,404,843,328
  5. Step 5: Solve for x
    x = 232,347,724,404,843,328/419,906,430.40
  6. Step 6: Final answer
    x = 553,332,141.60

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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.