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Finding the Fourth Proportional to 212,863.80, 318,906.90 and 173,206.20

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Solution

The fourth proportional to 212,863.80, 318,906.90 and 173,206.20 is: 259,492.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,863.80 : 318,906.90 = 173,206.20 : x
  2. Step 2: Convert to fraction form
    212,863.80/318,906.90 = 173,206.20/x
  3. Step 3: Cross multiply
    212,863.80x = 318,906.90 × 173,206.20
  4. Step 4: Simplify right side
    212,863.80x = 55,236,652,302.78
  5. Step 5: Solve for x
    x = 55,236,652,302.78/212,863.80
  6. Step 6: Final answer
    x = 259,492.94

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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.