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Finding the Fourth Proportional to 281,920.79, 389,050.74 and 154,599.05

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Solution

The fourth proportional to 281,920.79, 389,050.74 and 154,599.05 is: 213,346.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,920.79 : 389,050.74 = 154,599.05 : x
  2. Step 2: Convert to fraction form
    281,920.79/389,050.74 = 154,599.05/x
  3. Step 3: Cross multiply
    281,920.79x = 389,050.74 × 154,599.05
  4. Step 4: Simplify right side
    281,920.79x = 60,146,872,860.54
  5. Step 5: Solve for x
    x = 60,146,872,860.54/281,920.79
  6. Step 6: Final answer
    x = 213,346.71

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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.