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Finding the Fourth Proportional to 212,638.80, 318,958.20 and 154,027.20

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Solution

The fourth proportional to 212,638.80, 318,958.20 and 154,027.20 is: 231,040.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,638.80 : 318,958.20 = 154,027.20 : x
  2. Step 2: Convert to fraction form
    212,638.80/318,958.20 = 154,027.20/x
  3. Step 3: Cross multiply
    212,638.80x = 318,958.20 × 154,027.20
  4. Step 4: Simplify right side
    212,638.80x = 49,128,238,463.04
  5. Step 5: Solve for x
    x = 49,128,238,463.04/212,638.80
  6. Step 6: Final answer
    x = 231,040.80

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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.