Home / 1,281.33-1,921.92-530.75

Finding the Fourth Proportional to 1,281.33, 1,921.92 and 530.75

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Solution

The fourth proportional to 1,281.33, 1,921.92 and 530.75 is: 796.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.33 : 1,921.92 = 530.75 : x
  2. Step 2: Convert to fraction form
    1,281.33/1,921.92 = 530.75/x
  3. Step 3: Cross multiply
    1,281.33x = 1,921.92 × 530.75
  4. Step 4: Simplify right side
    1,281.33x = 1,020,049.43
  5. Step 5: Solve for x
    x = 1,020,049.43/1,281.33
  6. Step 6: Final answer
    x = 796.09

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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.