Home / 860,568,369.30-1,290,852,553.95-278,720,190.45

Finding the Fourth Proportional to 860,568,369.30, 1,290,852,553.95 and 278,720,190.45

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Solution

The fourth proportional to 860,568,369.30, 1,290,852,553.95 and 278,720,190.45 is: 418,080,285.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,568,369.30 : 1,290,852,553.95 = 278,720,190.45 : x
  2. Step 2: Convert to fraction form
    860,568,369.30/1,290,852,553.95 = 278,720,190.45/x
  3. Step 3: Cross multiply
    860,568,369.30x = 1,290,852,553.95 × 278,720,190.45
  4. Step 4: Simplify right side
    860,568,369.30x = 359,786,669,679,812,928
  5. Step 5: Solve for x
    x = 359,786,669,679,812,928/860,568,369.30
  6. Step 6: Final answer
    x = 418,080,285.68

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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.