Home / 919,921.92-1,379,415.36-420,858.24

Finding the Fourth Proportional to 919,921.92, 1,379,415.36 and 420,858.24

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Solution

The fourth proportional to 919,921.92, 1,379,415.36 and 420,858.24 is: 631,073.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,921.92 : 1,379,415.36 = 420,858.24 : x
  2. Step 2: Convert to fraction form
    919,921.92/1,379,415.36 = 420,858.24/x
  3. Step 3: Cross multiply
    919,921.92x = 1,379,415.36 × 420,858.24
  4. Step 4: Simplify right side
    919,921.92x = 580,538,320,638.57
  5. Step 5: Solve for x
    x = 580,538,320,638.57/919,921.92
  6. Step 6: Final answer
    x = 631,073.47

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1.5x scale

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.