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Finding the Fourth Proportional to 212,717.80, 318,785.10 and 173,351.80

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Solution

The fourth proportional to 212,717.80, 318,785.10 and 173,351.80 is: 259,790.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,717.80 : 318,785.10 = 173,351.80 : x
  2. Step 2: Convert to fraction form
    212,717.80/318,785.10 = 173,351.80/x
  3. Step 3: Cross multiply
    212,717.80x = 318,785.10 × 173,351.80
  4. Step 4: Simplify right side
    212,717.80x = 55,261,970,898.18
  5. Step 5: Solve for x
    x = 55,261,970,898.18/212,717.80
  6. Step 6: Final answer
    x = 259,790.06

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1.5x scale

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.