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Finding the Fourth Proportional to 426,518.73, 642,309.21 and 379,804.41

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Solution

The fourth proportional to 426,518.73, 642,309.21 and 379,804.41 is: 571,960.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,518.73 : 642,309.21 = 379,804.41 : x
  2. Step 2: Convert to fraction form
    426,518.73/642,309.21 = 379,804.41/x
  3. Step 3: Cross multiply
    426,518.73x = 642,309.21 × 379,804.41
  4. Step 4: Simplify right side
    426,518.73x = 243,951,870,541.62
  5. Step 5: Solve for x
    x = 243,951,870,541.62/426,518.73
  6. Step 6: Final answer
    x = 571,960.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.