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Finding the Fourth Proportional to 257,957.87, 355,976.85 and 143,230.59

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Solution

The fourth proportional to 257,957.87, 355,976.85 and 143,230.59 is: 197,655.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,957.87 : 355,976.85 = 143,230.59 : x
  2. Step 2: Convert to fraction form
    257,957.87/355,976.85 = 143,230.59/x
  3. Step 3: Cross multiply
    257,957.87x = 355,976.85 × 143,230.59
  4. Step 4: Simplify right side
    257,957.87x = 50,986,774,251.84
  5. Step 5: Solve for x
    x = 50,986,774,251.84/257,957.87
  6. Step 6: Final answer
    x = 197,655.44

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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.