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Finding the Fourth Proportional to 257,958.87, 355,978.23 and 143,231.59

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Solution

The fourth proportional to 257,958.87, 355,978.23 and 143,231.59 is: 197,656.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,958.87 : 355,978.23 = 143,231.59 : x
  2. Step 2: Convert to fraction form
    257,958.87/355,978.23 = 143,231.59/x
  3. Step 3: Cross multiply
    257,958.87x = 355,978.23 × 143,231.59
  4. Step 4: Simplify right side
    257,958.87x = 50,987,327,888.29
  5. Step 5: Solve for x
    x = 50,987,327,888.29/257,958.87
  6. Step 6: Final answer
    x = 197,656.81

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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.