Home / 1,729.61-2,389.07-1,207.97

Finding the Fourth Proportional to 1,729.61, 2,389.07 and 1,207.97

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Solution

The fourth proportional to 1,729.61, 2,389.07 and 1,207.97 is: 1,668.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.61 : 2,389.07 = 1,207.97 : x
  2. Step 2: Convert to fraction form
    1,729.61/2,389.07 = 1,207.97/x
  3. Step 3: Cross multiply
    1,729.61x = 2,389.07 × 1,207.97
  4. Step 4: Simplify right side
    1,729.61x = 2,885,924.89
  5. Step 5: Solve for x
    x = 2,885,924.89/1,729.61
  6. Step 6: Final answer
    x = 1,668.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.