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Finding the Fourth Proportional to 281,521.44, 388,501.92 and 154,208.88

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Solution

The fourth proportional to 281,521.44, 388,501.92 and 154,208.88 is: 212,809.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,521.44 : 388,501.92 = 154,208.88 : x
  2. Step 2: Convert to fraction form
    281,521.44/388,501.92 = 154,208.88/x
  3. Step 3: Cross multiply
    281,521.44x = 388,501.92 × 154,208.88
  4. Step 4: Simplify right side
    281,521.44x = 59,910,445,961.05
  5. Step 5: Solve for x
    x = 59,910,445,961.05/281,521.44
  6. Step 6: Final answer
    x = 212,809.53

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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.