Home / 385,280.62-531,727.26-221,942.80

Finding the Fourth Proportional to 385,280.62, 531,727.26 and 221,942.80

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Solution

The fourth proportional to 385,280.62, 531,727.26 and 221,942.80 is: 306,304.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,280.62 : 531,727.26 = 221,942.80 : x
  2. Step 2: Convert to fraction form
    385,280.62/531,727.26 = 221,942.80/x
  3. Step 3: Cross multiply
    385,280.62x = 531,727.26 × 221,942.80
  4. Step 4: Simplify right side
    385,280.62x = 118,013,036,920.73
  5. Step 5: Solve for x
    x = 118,013,036,920.73/385,280.62
  6. Step 6: Final answer
    x = 306,304.11

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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.