Home / 210,515.45-290,517.69-115,028.28

Finding the Fourth Proportional to 210,515.45, 290,517.69 and 115,028.28

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Solution

The fourth proportional to 210,515.45, 290,517.69 and 115,028.28 is: 158,742.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,515.45 : 290,517.69 = 115,028.28 : x
  2. Step 2: Convert to fraction form
    210,515.45/290,517.69 = 115,028.28/x
  3. Step 3: Cross multiply
    210,515.45x = 290,517.69 × 115,028.28
  4. Step 4: Simplify right side
    210,515.45x = 33,417,750,190.27
  5. Step 5: Solve for x
    x = 33,417,750,190.27/210,515.45
  6. Step 6: Final answer
    x = 158,742.51

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1.5x scale

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.