Home / 1,728.86-2,385.93-1,308.49

Finding the Fourth Proportional to 1,728.86, 2,385.93 and 1,308.49

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Solution

The fourth proportional to 1,728.86, 2,385.93 and 1,308.49 is: 1,805.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.86 : 2,385.93 = 1,308.49 : x
  2. Step 2: Convert to fraction form
    1,728.86/2,385.93 = 1,308.49/x
  3. Step 3: Cross multiply
    1,728.86x = 2,385.93 × 1,308.49
  4. Step 4: Simplify right side
    1,728.86x = 3,121,959.58
  5. Step 5: Solve for x
    x = 3,121,959.58/1,728.86
  6. Step 6: Final answer
    x = 1,805.79

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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.