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Finding the Fourth Proportional to 431,796,389.70, 647,694,584.55 and 248,130,380.10

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Solution

The fourth proportional to 431,796,389.70, 647,694,584.55 and 248,130,380.10 is: 372,195,570.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,796,389.70 : 647,694,584.55 = 248,130,380.10 : x
  2. Step 2: Convert to fraction form
    431,796,389.70/647,694,584.55 = 248,130,380.10/x
  3. Step 3: Cross multiply
    431,796,389.70x = 647,694,584.55 × 248,130,380.10
  4. Step 4: Simplify right side
    431,796,389.70x = 160,712,703,453,103,072
  5. Step 5: Solve for x
    x = 160,712,703,453,103,072/431,796,389.70
  6. Step 6: Final answer
    x = 372,195,570.15

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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.