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Finding the Fourth Proportional to 3,905.81, 5,858.51 and 1,440.42

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Solution

The fourth proportional to 3,905.81, 5,858.51 and 1,440.42 is: 2,160.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.81 : 5,858.51 = 1,440.42 : x
  2. Step 2: Convert to fraction form
    3,905.81/5,858.51 = 1,440.42/x
  3. Step 3: Cross multiply
    3,905.81x = 5,858.51 × 1,440.42
  4. Step 4: Simplify right side
    3,905.81x = 8,438,707.77
  5. Step 5: Solve for x
    x = 8,438,707.77/3,905.81
  6. Step 6: Final answer
    x = 2,160.56

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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.