Home / 1,274,816.20-1,912,454.70-642,137.80

Finding the Fourth Proportional to 1,274,816.20, 1,912,454.70 and 642,137.80

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Solution

The fourth proportional to 1,274,816.20, 1,912,454.70 and 642,137.80 is: 963,322.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274,816.20 : 1,912,454.70 = 642,137.80 : x
  2. Step 2: Convert to fraction form
    1,274,816.20/1,912,454.70 = 642,137.80/x
  3. Step 3: Cross multiply
    1,274,816.20x = 1,912,454.70 × 642,137.80
  4. Step 4: Simplify right side
    1,274,816.20x = 1,228,059,453,657.66
  5. Step 5: Solve for x
    x = 1,228,059,453,657.66/1,274,816.20
  6. Step 6: Final answer
    x = 963,322.75

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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.