Home / 1,728.79-2,386.60-1,020.84

Finding the Fourth Proportional to 1,728.79, 2,386.60 and 1,020.84

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Solution

The fourth proportional to 1,728.79, 2,386.60 and 1,020.84 is: 1,409.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.79 : 2,386.60 = 1,020.84 : x
  2. Step 2: Convert to fraction form
    1,728.79/2,386.60 = 1,020.84/x
  3. Step 3: Cross multiply
    1,728.79x = 2,386.60 × 1,020.84
  4. Step 4: Simplify right side
    1,728.79x = 2,436,336.74
  5. Step 5: Solve for x
    x = 2,436,336.74/1,728.79
  6. Step 6: Final answer
    x = 1,409.28

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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.