Home / 257,970.60-355,979.07-143,238.42

Finding the Fourth Proportional to 257,970.60, 355,979.07 and 143,238.42

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Solution

The fourth proportional to 257,970.60, 355,979.07 and 143,238.42 is: 197,657.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,970.60 : 355,979.07 = 143,238.42 : x
  2. Step 2: Convert to fraction form
    257,970.60/355,979.07 = 143,238.42/x
  3. Step 3: Cross multiply
    257,970.60x = 355,979.07 × 143,238.42
  4. Step 4: Simplify right side
    257,970.60x = 50,989,879,539.87
  5. Step 5: Solve for x
    x = 50,989,879,539.87/257,970.60
  6. Step 6: Final answer
    x = 197,657.72

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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.