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Finding the Fourth Proportional to 620,768.12, 856,675.22 and 348,819.71

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Solution

The fourth proportional to 620,768.12, 856,675.22 and 348,819.71 is: 481,379.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,768.12 : 856,675.22 = 348,819.71 : x
  2. Step 2: Convert to fraction form
    620,768.12/856,675.22 = 348,819.71/x
  3. Step 3: Cross multiply
    620,768.12x = 856,675.22 × 348,819.71
  4. Step 4: Simplify right side
    620,768.12x = 298,825,195,777.11
  5. Step 5: Solve for x
    x = 298,825,195,777.11/620,768.12
  6. Step 6: Final answer
    x = 481,379.74

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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.