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Finding the Fourth Proportional to 320,851.71, 481,115.57 and 187,771.95

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Solution

The fourth proportional to 320,851.71, 481,115.57 and 187,771.95 is: 281,563.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,851.71 : 481,115.57 = 187,771.95 : x
  2. Step 2: Convert to fraction form
    320,851.71/481,115.57 = 187,771.95/x
  3. Step 3: Cross multiply
    320,851.71x = 481,115.57 × 187,771.95
  4. Step 4: Simplify right side
    320,851.71x = 90,340,007,815.40
  5. Step 5: Solve for x
    x = 90,340,007,815.40/320,851.71
  6. Step 6: Final answer
    x = 281,563.12

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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.