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Finding the Fourth Proportional to 331,271.71, 496,942.07 and 91,385.64

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Solution

The fourth proportional to 331,271.71, 496,942.07 and 91,385.64 is: 137,087.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,271.71 : 496,942.07 = 91,385.64 : x
  2. Step 2: Convert to fraction form
    331,271.71/496,942.07 = 91,385.64/x
  3. Step 3: Cross multiply
    331,271.71x = 496,942.07 × 91,385.64
  4. Step 4: Simplify right side
    331,271.71x = 45,413,368,652.95
  5. Step 5: Solve for x
    x = 45,413,368,652.95/331,271.71
  6. Step 6: Final answer
    x = 137,087.98

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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.