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Finding the Fourth Proportional to 420,766.92, 580,634.62 and 239,522.96

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Solution

The fourth proportional to 420,766.92, 580,634.62 and 239,522.96 is: 330,528.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,766.92 : 580,634.62 = 239,522.96 : x
  2. Step 2: Convert to fraction form
    420,766.92/580,634.62 = 239,522.96/x
  3. Step 3: Cross multiply
    420,766.92x = 580,634.62 × 239,522.96
  4. Step 4: Simplify right side
    420,766.92x = 139,075,322,860.88
  5. Step 5: Solve for x
    x = 139,075,322,860.88/420,766.92
  6. Step 6: Final answer
    x = 330,528.18

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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.