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Finding the Fourth Proportional to 620,285.91, 856,015.20 and 348,401.76

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Solution

The fourth proportional to 620,285.91, 856,015.20 and 348,401.76 is: 480,806.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,285.91 : 856,015.20 = 348,401.76 : x
  2. Step 2: Convert to fraction form
    620,285.91/856,015.20 = 348,401.76/x
  3. Step 3: Cross multiply
    620,285.91x = 856,015.20 × 348,401.76
  4. Step 4: Simplify right side
    620,285.91x = 298,237,202,266.75
  5. Step 5: Solve for x
    x = 298,237,202,266.75/620,285.91
  6. Step 6: Final answer
    x = 480,806.02

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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.