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Finding the Fourth Proportional to 212,612.78, 318,919.59 and 199,622.00

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Solution

The fourth proportional to 212,612.78, 318,919.59 and 199,622.00 is: 299,433.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,612.78 : 318,919.59 = 199,622.00 : x
  2. Step 2: Convert to fraction form
    212,612.78/318,919.59 = 199,622.00/x
  3. Step 3: Cross multiply
    212,612.78x = 318,919.59 × 199,622.00
  4. Step 4: Simplify right side
    212,612.78x = 63,663,364,800.38
  5. Step 5: Solve for x
    x = 63,663,364,800.38/212,612.78
  6. Step 6: Final answer
    x = 299,433.39

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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.