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Finding the Fourth Proportional to 328,004.58, 492,130.80 and 128,467.56

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Solution

The fourth proportional to 328,004.58, 492,130.80 and 128,467.56 is: 192,749.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,004.58 : 492,130.80 = 128,467.56 : x
  2. Step 2: Convert to fraction form
    328,004.58/492,130.80 = 128,467.56/x
  3. Step 3: Cross multiply
    328,004.58x = 492,130.80 × 128,467.56
  4. Step 4: Simplify right side
    328,004.58x = 63,222,843,076.85
  5. Step 5: Solve for x
    x = 63,222,843,076.85/328,004.58
  6. Step 6: Final answer
    x = 192,749.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.