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Finding the Fourth Proportional to 420,463.94, 580,038.44 and 275,205.83

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Solution

The fourth proportional to 420,463.94, 580,038.44 and 275,205.83 is: 379,651.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,463.94 : 580,038.44 = 275,205.83 : x
  2. Step 2: Convert to fraction form
    420,463.94/580,038.44 = 275,205.83/x
  3. Step 3: Cross multiply
    420,463.94x = 580,038.44 × 275,205.83
  4. Step 4: Simplify right side
    420,463.94x = 159,629,956,035.88
  5. Step 5: Solve for x
    x = 159,629,956,035.88/420,463.94
  6. Step 6: Final answer
    x = 379,651.96

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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.