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Finding the Fourth Proportional to 330,698, 496,047 and 81,380

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Solution

The fourth proportional to 330,698, 496,047 and 81,380 is: 122,070

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,698 : 496,047 = 81,380 : x
  2. Step 2: Convert to fraction form
    330,698/496,047 = 81,380/x
  3. Step 3: Cross multiply
    330,698x = 496,047 × 81,380
  4. Step 4: Simplify right side
    330,698x = 40,368,304,860
  5. Step 5: Solve for x
    x = 40,368,304,860/330,698
  6. Step 6: Final answer
    x = 122,070

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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.