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Finding the Fourth Proportional to 640,987,220.90, 962,488,600.95 and 368,889,428.90

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Solution

The fourth proportional to 640,987,220.90, 962,488,600.95 and 368,889,428.90 is: 553,914,116.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,987,220.90 : 962,488,600.95 = 368,889,428.90 : x
  2. Step 2: Convert to fraction form
    640,987,220.90/962,488,600.95 = 368,889,428.90/x
  3. Step 3: Cross multiply
    640,987,220.90x = 962,488,600.95 × 368,889,428.90
  4. Step 4: Simplify right side
    640,987,220.90x = 355,051,870,327,205,504
  5. Step 5: Solve for x
    x = 355,051,870,327,205,504/640,987,220.90
  6. Step 6: Final answer
    x = 553,914,116.77

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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.