Home / 256,515.37-353,989.07-143,338.21

Finding the Fourth Proportional to 256,515.37, 353,989.07 and 143,338.21

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Solution

The fourth proportional to 256,515.37, 353,989.07 and 143,338.21 is: 197,805.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,515.37 : 353,989.07 = 143,338.21 : x
  2. Step 2: Convert to fraction form
    256,515.37/353,989.07 = 143,338.21/x
  3. Step 3: Cross multiply
    256,515.37x = 353,989.07 × 143,338.21
  4. Step 4: Simplify right side
    256,515.37x = 50,740,158,936.67
  5. Step 5: Solve for x
    x = 50,740,158,936.67/256,515.37
  6. Step 6: Final answer
    x = 197,805.53

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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.