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Finding the Fourth Proportional to 620,851.34, 856,845.87 and 345,236.67

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Solution

The fourth proportional to 620,851.34, 856,845.87 and 345,236.67 is: 476,466.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,851.34 : 856,845.87 = 345,236.67 : x
  2. Step 2: Convert to fraction form
    620,851.34/856,845.87 = 345,236.67/x
  3. Step 3: Cross multiply
    620,851.34x = 856,845.87 × 345,236.67
  4. Step 4: Simplify right side
    620,851.34x = 295,814,614,862.05
  5. Step 5: Solve for x
    x = 295,814,614,862.05/620,851.34
  6. Step 6: Final answer
    x = 476,466.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.