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Finding the Fourth Proportional to 281,561.83, 388,555.40 and 154,241.95

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Solution

The fourth proportional to 281,561.83, 388,555.40 and 154,241.95 is: 212,853.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,561.83 : 388,555.40 = 154,241.95 : x
  2. Step 2: Convert to fraction form
    281,561.83/388,555.40 = 154,241.95/x
  3. Step 3: Cross multiply
    281,561.83x = 388,555.40 × 154,241.95
  4. Step 4: Simplify right side
    281,561.83x = 59,931,542,579.03
  5. Step 5: Solve for x
    x = 59,931,542,579.03/281,561.83
  6. Step 6: Final answer
    x = 212,853.93

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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.