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Finding the Fourth Proportional to 281,700.76, 388,747.04 and 154,379.28

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Solution

The fourth proportional to 281,700.76, 388,747.04 and 154,379.28 is: 213,043.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,700.76 : 388,747.04 = 154,379.28 : x
  2. Step 2: Convert to fraction form
    281,700.76/388,747.04 = 154,379.28/x
  3. Step 3: Cross multiply
    281,700.76x = 388,747.04 × 154,379.28
  4. Step 4: Simplify right side
    281,700.76x = 60,014,488,137.33
  5. Step 5: Solve for x
    x = 60,014,488,137.33/281,700.76
  6. Step 6: Final answer
    x = 213,043.40

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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.