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Finding the Fourth Proportional to 212,279.70, 318,419.55 and 204,114.90

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Solution

The fourth proportional to 212,279.70, 318,419.55 and 204,114.90 is: 306,172.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,279.70 : 318,419.55 = 204,114.90 : x
  2. Step 2: Convert to fraction form
    212,279.70/318,419.55 = 204,114.90/x
  3. Step 3: Cross multiply
    212,279.70x = 318,419.55 × 204,114.90
  4. Step 4: Simplify right side
    212,279.70x = 64,994,174,606.30
  5. Step 5: Solve for x
    x = 64,994,174,606.30/212,279.70
  6. Step 6: Final answer
    x = 306,172.35

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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.