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Finding the Fourth Proportional to 919,521,799.20, 1,379,954,545.20 and 647,424,007.20

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Solution

The fourth proportional to 919,521,799.20, 1,379,954,545.20 and 647,424,007.20 is: 971,609,049.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,521,799.20 : 1,379,954,545.20 = 647,424,007.20 : x
  2. Step 2: Convert to fraction form
    919,521,799.20/1,379,954,545.20 = 647,424,007.20/x
  3. Step 3: Cross multiply
    919,521,799.20x = 1,379,954,545.20 × 647,424,007.20
  4. Step 4: Simplify right side
    919,521,799.20x = 893,415,701,407,237,632
  5. Step 5: Solve for x
    x = 893,415,701,407,237,632/919,521,799.20
  6. Step 6: Final answer
    x = 971,609,049.60

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.