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Finding the Fourth Proportional to 512,579.70, 768,869.55 and 212,960.70

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Solution

The fourth proportional to 512,579.70, 768,869.55 and 212,960.70 is: 319,441.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,579.70 : 768,869.55 = 212,960.70 : x
  2. Step 2: Convert to fraction form
    512,579.70/768,869.55 = 212,960.70/x
  3. Step 3: Cross multiply
    512,579.70x = 768,869.55 × 212,960.70
  4. Step 4: Simplify right side
    512,579.70x = 163,738,997,576.69
  5. Step 5: Solve for x
    x = 163,738,997,576.69/512,579.70
  6. Step 6: Final answer
    x = 319,441.05

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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.