Home / 330,438.88-456,213.36-217,453.60

Finding the Fourth Proportional to 330,438.88, 456,213.36 and 217,453.60

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Solution

The fourth proportional to 330,438.88, 456,213.36 and 217,453.60 is: 300,222.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,438.88 : 456,213.36 = 217,453.60 : x
  2. Step 2: Convert to fraction form
    330,438.88/456,213.36 = 217,453.60/x
  3. Step 3: Cross multiply
    330,438.88x = 456,213.36 × 217,453.60
  4. Step 4: Simplify right side
    330,438.88x = 99,205,237,500.10
  5. Step 5: Solve for x
    x = 99,205,237,500.10/330,438.88
  6. Step 6: Final answer
    x = 300,222.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.