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Finding the Fourth Proportional to 281,621, 388,636.98 and 154,299.54

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Solution

The fourth proportional to 281,621, 388,636.98 and 154,299.54 is: 212,933.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,621 : 388,636.98 = 154,299.54 : x
  2. Step 2: Convert to fraction form
    281,621/388,636.98 = 154,299.54/x
  3. Step 3: Cross multiply
    281,621x = 388,636.98 × 154,299.54
  4. Step 4: Simplify right side
    281,621x = 59,966,507,240.99
  5. Step 5: Solve for x
    x = 59,966,507,240.99/281,621
  6. Step 6: Final answer
    x = 212,933.37

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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.