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Finding the Fourth Proportional to 419,477.56, 578,879.28 and 228,491.80

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Solution

The fourth proportional to 419,477.56, 578,879.28 and 228,491.80 is: 315,318.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,477.56 : 578,879.28 = 228,491.80 : x
  2. Step 2: Convert to fraction form
    419,477.56/578,879.28 = 228,491.80/x
  3. Step 3: Cross multiply
    419,477.56x = 578,879.28 × 228,491.80
  4. Step 4: Simplify right side
    419,477.56x = 132,269,168,669.90
  5. Step 5: Solve for x
    x = 132,269,168,669.90/419,477.56
  6. Step 6: Final answer
    x = 315,318.82

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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.