Home / 1,728.36-2,387.91-1,206.72

Finding the Fourth Proportional to 1,728.36, 2,387.91 and 1,206.72

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Solution

The fourth proportional to 1,728.36, 2,387.91 and 1,206.72 is: 1,667.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.36 : 2,387.91 = 1,206.72 : x
  2. Step 2: Convert to fraction form
    1,728.36/2,387.91 = 1,206.72/x
  3. Step 3: Cross multiply
    1,728.36x = 2,387.91 × 1,206.72
  4. Step 4: Simplify right side
    1,728.36x = 2,881,538.76
  5. Step 5: Solve for x
    x = 2,881,538.76/1,728.36
  6. Step 6: Final answer
    x = 1,667.21

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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.