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Finding the Fourth Proportional to 321,455.21, 482,148.98 and 131,935.64

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Solution

The fourth proportional to 321,455.21, 482,148.98 and 131,935.64 is: 197,889.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,455.21 : 482,148.98 = 131,935.64 : x
  2. Step 2: Convert to fraction form
    321,455.21/482,148.98 = 131,935.64/x
  3. Step 3: Cross multiply
    321,455.21x = 482,148.98 × 131,935.64
  4. Step 4: Simplify right side
    321,455.21x = 63,612,632,047.05
  5. Step 5: Solve for x
    x = 63,612,632,047.05/321,455.21
  6. Step 6: Final answer
    x = 197,889.57

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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.