Home / 431,796,356.40-647,694,534.60-423,187,012.20

Finding the Fourth Proportional to 431,796,356.40, 647,694,534.60 and 423,187,012.20

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Solution

The fourth proportional to 431,796,356.40, 647,694,534.60 and 423,187,012.20 is: 634,780,518.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,796,356.40 : 647,694,534.60 = 423,187,012.20 : x
  2. Step 2: Convert to fraction form
    431,796,356.40/647,694,534.60 = 423,187,012.20/x
  3. Step 3: Cross multiply
    431,796,356.40x = 647,694,534.60 × 423,187,012.20
  4. Step 4: Simplify right side
    431,796,356.40x = 274,095,914,915,643,520
  5. Step 5: Solve for x
    x = 274,095,914,915,643,520/431,796,356.40
  6. Step 6: Final answer
    x = 634,780,518.30

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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.