Home / 1,678.31-2,317.07-1,089.95

Finding the Fourth Proportional to 1,678.31, 2,317.07 and 1,089.95

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Solution

The fourth proportional to 1,678.31, 2,317.07 and 1,089.95 is: 1,504.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.31 : 2,317.07 = 1,089.95 : x
  2. Step 2: Convert to fraction form
    1,678.31/2,317.07 = 1,089.95/x
  3. Step 3: Cross multiply
    1,678.31x = 2,317.07 × 1,089.95
  4. Step 4: Simplify right side
    1,678.31x = 2,525,485.00
  5. Step 5: Solve for x
    x = 2,525,485.00/1,678.31
  6. Step 6: Final answer
    x = 1,504.78

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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.