Home / 2,128.74-3,187.62-1,304.51

Finding the Fourth Proportional to 2,128.74, 3,187.62 and 1,304.51

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Solution

The fourth proportional to 2,128.74, 3,187.62 and 1,304.51 is: 1,953.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.74 : 3,187.62 = 1,304.51 : x
  2. Step 2: Convert to fraction form
    2,128.74/3,187.62 = 1,304.51/x
  3. Step 3: Cross multiply
    2,128.74x = 3,187.62 × 1,304.51
  4. Step 4: Simplify right side
    2,128.74x = 4,158,266.23
  5. Step 5: Solve for x
    x = 4,158,266.23/2,128.74
  6. Step 6: Final answer
    x = 1,953.39

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1.5x scale

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.