Home / 1,728.74-2,385.93-982.70

Finding the Fourth Proportional to 1,728.74, 2,385.93 and 982.70

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Solution

The fourth proportional to 1,728.74, 2,385.93 and 982.70 is: 1,356.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.74 : 2,385.93 = 982.70 : x
  2. Step 2: Convert to fraction form
    1,728.74/2,385.93 = 982.70/x
  3. Step 3: Cross multiply
    1,728.74x = 2,385.93 × 982.70
  4. Step 4: Simplify right side
    1,728.74x = 2,344,653.41
  5. Step 5: Solve for x
    x = 2,344,653.41/1,728.74
  6. Step 6: Final answer
    x = 1,356.28

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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.