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Finding the Fourth Proportional to 305,978,266.80, 458,967,400.20 and 258,626,873.70

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Solution

The fourth proportional to 305,978,266.80, 458,967,400.20 and 258,626,873.70 is: 387,940,310.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,978,266.80 : 458,967,400.20 = 258,626,873.70 : x
  2. Step 2: Convert to fraction form
    305,978,266.80/458,967,400.20 = 258,626,873.70/x
  3. Step 3: Cross multiply
    305,978,266.80x = 458,967,400.20 × 258,626,873.70
  4. Step 4: Simplify right side
    305,978,266.80x = 118,701,303,843,942,752
  5. Step 5: Solve for x
    x = 118,701,303,843,942,752/305,978,266.80
  6. Step 6: Final answer
    x = 387,940,310.55

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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.