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Finding the Fourth Proportional to 620,778.60, 856,610.64 and 348,803.28

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Solution

The fourth proportional to 620,778.60, 856,610.64 and 348,803.28 is: 481,312.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,778.60 : 856,610.64 = 348,803.28 : x
  2. Step 2: Convert to fraction form
    620,778.60/856,610.64 = 348,803.28/x
  3. Step 3: Cross multiply
    620,778.60x = 856,610.64 × 348,803.28
  4. Step 4: Simplify right side
    620,778.60x = 298,788,600,914.90
  5. Step 5: Solve for x
    x = 298,788,600,914.90/620,778.60
  6. Step 6: Final answer
    x = 481,312.66

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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.