Home / 919,928.76-1,379,392.29-320,728.83

Finding the Fourth Proportional to 919,928.76, 1,379,392.29 and 320,728.83

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Solution

The fourth proportional to 919,928.76, 1,379,392.29 and 320,728.83 is: 480,918.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,928.76 : 1,379,392.29 = 320,728.83 : x
  2. Step 2: Convert to fraction form
    919,928.76/1,379,392.29 = 320,728.83/x
  3. Step 3: Cross multiply
    919,928.76x = 1,379,392.29 × 320,728.83
  4. Step 4: Simplify right side
    919,928.76x = 442,410,875,282.72
  5. Step 5: Solve for x
    x = 442,410,875,282.72/919,928.76
  6. Step 6: Final answer
    x = 480,918.63

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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.