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Finding the Fourth Proportional to 281,712.04, 388,761.06 and 154,383.28

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Solution

The fourth proportional to 281,712.04, 388,761.06 and 154,383.28 is: 213,048.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,712.04 : 388,761.06 = 154,383.28 : x
  2. Step 2: Convert to fraction form
    281,712.04/388,761.06 = 154,383.28/x
  3. Step 3: Cross multiply
    281,712.04x = 388,761.06 × 154,383.28
  4. Step 4: Simplify right side
    281,712.04x = 60,018,207,579.08
  5. Step 5: Solve for x
    x = 60,018,207,579.08/281,712.04
  6. Step 6: Final answer
    x = 213,048.07

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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.