Home / 1,370.06-2,055.45-639.26

Finding the Fourth Proportional to 1,370.06, 2,055.45 and 639.26

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Solution

The fourth proportional to 1,370.06, 2,055.45 and 639.26 is: 959.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.06 : 2,055.45 = 639.26 : x
  2. Step 2: Convert to fraction form
    1,370.06/2,055.45 = 639.26/x
  3. Step 3: Cross multiply
    1,370.06x = 2,055.45 × 639.26
  4. Step 4: Simplify right side
    1,370.06x = 1,313,966.97
  5. Step 5: Solve for x
    x = 1,313,966.97/1,370.06
  6. Step 6: Final answer
    x = 959.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.