Home / 1,354.89-2,032.40-381.09

Finding the Fourth Proportional to 1,354.89, 2,032.40 and 381.09

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Solution

The fourth proportional to 1,354.89, 2,032.40 and 381.09 is: 571.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.89 : 2,032.40 = 381.09 : x
  2. Step 2: Convert to fraction form
    1,354.89/2,032.40 = 381.09/x
  3. Step 3: Cross multiply
    1,354.89x = 2,032.40 × 381.09
  4. Step 4: Simplify right side
    1,354.89x = 774,527.32
  5. Step 5: Solve for x
    x = 774,527.32/1,354.89
  6. Step 6: Final answer
    x = 571.65

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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.