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Finding the Fourth Proportional to 281,736.63, 388,800 and 154,411.92

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Solution

The fourth proportional to 281,736.63, 388,800 and 154,411.92 is: 213,090.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,736.63 : 388,800 = 154,411.92 : x
  2. Step 2: Convert to fraction form
    281,736.63/388,800 = 154,411.92/x
  3. Step 3: Cross multiply
    281,736.63x = 388,800 × 154,411.92
  4. Step 4: Simplify right side
    281,736.63x = 60,035,354,496.00
  5. Step 5: Solve for x
    x = 60,035,354,496.00/281,736.63
  6. Step 6: Final answer
    x = 213,090.34

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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.