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Finding the Fourth Proportional to 398,840.64, 598,131.51 and 132,529.68

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Solution

The fourth proportional to 398,840.64, 598,131.51 and 132,529.68 is: 198,751.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,840.64 : 598,131.51 = 132,529.68 : x
  2. Step 2: Convert to fraction form
    398,840.64/598,131.51 = 132,529.68/x
  3. Step 3: Cross multiply
    398,840.64x = 598,131.51 × 132,529.68
  4. Step 4: Simplify right side
    398,840.64x = 79,270,177,618.22
  5. Step 5: Solve for x
    x = 79,270,177,618.22/398,840.64
  6. Step 6: Final answer
    x = 198,751.51

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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.