Home / 1,290.09-1,935.16-424.41

Finding the Fourth Proportional to 1,290.09, 1,935.16 and 424.41

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Solution

The fourth proportional to 1,290.09, 1,935.16 and 424.41 is: 636.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.09 : 1,935.16 = 424.41 : x
  2. Step 2: Convert to fraction form
    1,290.09/1,935.16 = 424.41/x
  3. Step 3: Cross multiply
    1,290.09x = 1,935.16 × 424.41
  4. Step 4: Simplify right side
    1,290.09x = 821,292.94
  5. Step 5: Solve for x
    x = 821,292.94/1,290.09
  6. Step 6: Final answer
    x = 636.61

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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.