Home / 1,515.06-2,090.75-851.87

Finding the Fourth Proportional to 1,515.06, 2,090.75 and 851.87

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Solution

The fourth proportional to 1,515.06, 2,090.75 and 851.87 is: 1,175.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.06 : 2,090.75 = 851.87 : x
  2. Step 2: Convert to fraction form
    1,515.06/2,090.75 = 851.87/x
  3. Step 3: Cross multiply
    1,515.06x = 2,090.75 × 851.87
  4. Step 4: Simplify right side
    1,515.06x = 1,781,048.17
  5. Step 5: Solve for x
    x = 1,781,048.17/1,515.06
  6. Step 6: Final answer
    x = 1,175.56

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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.