Home / 919,988.81-1,380,189.03-280,342.61

Finding the Fourth Proportional to 919,988.81, 1,380,189.03 and 280,342.61

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Solution

The fourth proportional to 919,988.81, 1,380,189.03 and 280,342.61 is: 420,576.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,988.81 : 1,380,189.03 = 280,342.61 : x
  2. Step 2: Convert to fraction form
    919,988.81/1,380,189.03 = 280,342.61/x
  3. Step 3: Cross multiply
    919,988.81x = 1,380,189.03 × 280,342.61
  4. Step 4: Simplify right side
    919,988.81x = 386,925,794,963.57
  5. Step 5: Solve for x
    x = 386,925,794,963.57/919,988.81
  6. Step 6: Final answer
    x = 420,576.63

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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.