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Finding the Fourth Proportional to 640,987,622.40, 962,489,203.20 and 368,889,830.40

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Solution

The fourth proportional to 640,987,622.40, 962,489,203.20 and 368,889,830.40 is: 553,914,719.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,987,622.40 : 962,489,203.20 = 368,889,830.40 : x
  2. Step 2: Convert to fraction form
    640,987,622.40/962,489,203.20 = 368,889,830.40/x
  3. Step 3: Cross multiply
    640,987,622.40x = 962,489,203.20 × 368,889,830.40
  4. Step 4: Simplify right side
    640,987,622.40x = 355,052,478,930,279,104
  5. Step 5: Solve for x
    x = 355,052,478,930,279,104/640,987,622.40
  6. Step 6: Final answer
    x = 553,914,719.29

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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.