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Finding the Fourth Proportional to 281,599.15, 388,608.21 and 154,274.80

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Solution

The fourth proportional to 281,599.15, 388,608.21 and 154,274.80 is: 212,899.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,599.15 : 388,608.21 = 154,274.80 : x
  2. Step 2: Convert to fraction form
    281,599.15/388,608.21 = 154,274.80/x
  3. Step 3: Cross multiply
    281,599.15x = 388,608.21 × 154,274.80
  4. Step 4: Simplify right side
    281,599.15x = 59,952,451,161.69
  5. Step 5: Solve for x
    x = 59,952,451,161.69/281,599.15
  6. Step 6: Final answer
    x = 212,899.98

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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.