Home / 1,021.16-1,531.75-290.65

Finding the Fourth Proportional to 1,021.16, 1,531.75 and 290.65

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Solution

The fourth proportional to 1,021.16, 1,531.75 and 290.65 is: 435.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.16 : 1,531.75 = 290.65 : x
  2. Step 2: Convert to fraction form
    1,021.16/1,531.75 = 290.65/x
  3. Step 3: Cross multiply
    1,021.16x = 1,531.75 × 290.65
  4. Step 4: Simplify right side
    1,021.16x = 445,198.58
  5. Step 5: Solve for x
    x = 445,198.58/1,021.16
  6. Step 6: Final answer
    x = 435.97

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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.