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Finding the Fourth Proportional to 255,889.62, 353,126.79 and 142,712.28

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Solution

The fourth proportional to 255,889.62, 353,126.79 and 142,712.28 is: 196,942.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,889.62 : 353,126.79 = 142,712.28 : x
  2. Step 2: Convert to fraction form
    255,889.62/353,126.79 = 142,712.28/x
  3. Step 3: Cross multiply
    255,889.62x = 353,126.79 × 142,712.28
  4. Step 4: Simplify right side
    255,889.62x = 50,395,529,329.98
  5. Step 5: Solve for x
    x = 50,395,529,329.98/255,889.62
  6. Step 6: Final answer
    x = 196,942.45

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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.