Home / 1,728.81-2,386.71-1,374.21

Finding the Fourth Proportional to 1,728.81, 2,386.71 and 1,374.21

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Solution

The fourth proportional to 1,728.81, 2,386.71 and 1,374.21 is: 1,897.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.81 : 2,386.71 = 1,374.21 : x
  2. Step 2: Convert to fraction form
    1,728.81/2,386.71 = 1,374.21/x
  3. Step 3: Cross multiply
    1,728.81x = 2,386.71 × 1,374.21
  4. Step 4: Simplify right side
    1,728.81x = 3,279,840.75
  5. Step 5: Solve for x
    x = 3,279,840.75/1,728.81
  6. Step 6: Final answer
    x = 1,897.17

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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.