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Finding the Fourth Proportional to 281,683, 388,722.54 and 154,363.60

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Solution

The fourth proportional to 281,683, 388,722.54 and 154,363.60 is: 213,021.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,683 : 388,722.54 = 154,363.60 : x
  2. Step 2: Convert to fraction form
    281,683/388,722.54 = 154,363.60/x
  3. Step 3: Cross multiply
    281,683x = 388,722.54 × 154,363.60
  4. Step 4: Simplify right side
    281,683x = 60,004,610,675.54
  5. Step 5: Solve for x
    x = 60,004,610,675.54/281,683
  6. Step 6: Final answer
    x = 213,021.77

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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.