Home / 1,272.51-1,908.90-579.22

Finding the Fourth Proportional to 1,272.51, 1,908.90 and 579.22

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Solution

The fourth proportional to 1,272.51, 1,908.90 and 579.22 is: 868.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.51 : 1,908.90 = 579.22 : x
  2. Step 2: Convert to fraction form
    1,272.51/1,908.90 = 579.22/x
  3. Step 3: Cross multiply
    1,272.51x = 1,908.90 × 579.22
  4. Step 4: Simplify right side
    1,272.51x = 1,105,668.29
  5. Step 5: Solve for x
    x = 1,105,668.29/1,272.51
  6. Step 6: Final answer
    x = 868.89

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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.