Home / 919,870.32-1,380,035.12-320,840.09

Finding the Fourth Proportional to 919,870.32, 1,380,035.12 and 320,840.09

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Solution

The fourth proportional to 919,870.32, 1,380,035.12 and 320,840.09 is: 481,340.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,870.32 : 1,380,035.12 = 320,840.09 : x
  2. Step 2: Convert to fraction form
    919,870.32/1,380,035.12 = 320,840.09/x
  3. Step 3: Cross multiply
    919,870.32x = 1,380,035.12 × 320,840.09
  4. Step 4: Simplify right side
    919,870.32x = 442,770,583,599.59
  5. Step 5: Solve for x
    x = 442,770,583,599.59/919,870.32
  6. Step 6: Final answer
    x = 481,340.22

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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.