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Finding the Fourth Proportional to 1,211,647,781.49, 1,813,744,018.46 and 790,562,452.88

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Solution

The fourth proportional to 1,211,647,781.49, 1,813,744,018.46 and 790,562,452.88 is: 1,183,411,501.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,647,781.49 : 1,813,744,018.46 = 790,562,452.88 : x
  2. Step 2: Convert to fraction form
    1,211,647,781.49/1,813,744,018.46 = 790,562,452.88/x
  3. Step 3: Cross multiply
    1,211,647,781.49x = 1,813,744,018.46 × 790,562,452.88
  4. Step 4: Simplify right side
    1,211,647,781.49x = 1,433,877,920,136,676,608
  5. Step 5: Solve for x
    x = 1,433,877,920,136,676,608/1,211,647,781.49
  6. Step 6: Final answer
    x = 1,183,411,501.30

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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.