Home / 300,579.36-450,938.16-90,221.28

Finding the Fourth Proportional to 300,579.36, 450,938.16 and 90,221.28

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Solution

The fourth proportional to 300,579.36, 450,938.16 and 90,221.28 is: 135,352.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,579.36 : 450,938.16 = 90,221.28 : x
  2. Step 2: Convert to fraction form
    300,579.36/450,938.16 = 90,221.28/x
  3. Step 3: Cross multiply
    300,579.36x = 450,938.16 × 90,221.28
  4. Step 4: Simplify right side
    300,579.36x = 40,684,217,996.04
  5. Step 5: Solve for x
    x = 40,684,217,996.04/300,579.36
  6. Step 6: Final answer
    x = 135,352.67

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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.