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Finding the Fourth Proportional to 281,449.30, 388,388.37 and 154,122.70

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Solution

The fourth proportional to 281,449.30, 388,388.37 and 154,122.70 is: 212,682.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,449.30 : 388,388.37 = 154,122.70 : x
  2. Step 2: Convert to fraction form
    281,449.30/388,388.37 = 154,122.70/x
  3. Step 3: Cross multiply
    281,449.30x = 388,388.37 × 154,122.70
  4. Step 4: Simplify right side
    281,449.30x = 59,859,464,233.00
  5. Step 5: Solve for x
    x = 59,859,464,233.00/281,449.30
  6. Step 6: Final answer
    x = 212,682.94

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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.