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Finding the Fourth Proportional to 512,912.40, 769,368.60 and 133,832.40

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Solution

The fourth proportional to 512,912.40, 769,368.60 and 133,832.40 is: 200,748.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,912.40 : 769,368.60 = 133,832.40 : x
  2. Step 2: Convert to fraction form
    512,912.40/769,368.60 = 133,832.40/x
  3. Step 3: Cross multiply
    512,912.40x = 769,368.60 × 133,832.40
  4. Step 4: Simplify right side
    512,912.40x = 102,966,446,222.64
  5. Step 5: Solve for x
    x = 102,966,446,222.64/512,912.40
  6. Step 6: Final answer
    x = 200,748.60

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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.