Home / 1,728.60-2,386.26-1,231.80

Finding the Fourth Proportional to 1,728.60, 2,386.26 and 1,231.80

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Solution

The fourth proportional to 1,728.60, 2,386.26 and 1,231.80 is: 1,700.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.60 : 2,386.26 = 1,231.80 : x
  2. Step 2: Convert to fraction form
    1,728.60/2,386.26 = 1,231.80/x
  3. Step 3: Cross multiply
    1,728.60x = 2,386.26 × 1,231.80
  4. Step 4: Simplify right side
    1,728.60x = 2,939,395.07
  5. Step 5: Solve for x
    x = 2,939,395.07/1,728.60
  6. Step 6: Final answer
    x = 1,700.45

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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.