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Finding the Fourth Proportional to 289,361.85, 434,042.79 and 120,790.23

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Solution

The fourth proportional to 289,361.85, 434,042.79 and 120,790.23 is: 181,185.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,361.85 : 434,042.79 = 120,790.23 : x
  2. Step 2: Convert to fraction form
    289,361.85/434,042.79 = 120,790.23/x
  3. Step 3: Cross multiply
    289,361.85x = 434,042.79 × 120,790.23
  4. Step 4: Simplify right side
    289,361.85x = 52,428,128,433.94
  5. Step 5: Solve for x
    x = 52,428,128,433.94/289,361.85
  6. Step 6: Final answer
    x = 181,185.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.