Home / 1,331.68-2,009.80-1,297.12

Finding the Fourth Proportional to 1,331.68, 2,009.80 and 1,297.12

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Solution

The fourth proportional to 1,331.68, 2,009.80 and 1,297.12 is: 1,957.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.68 : 2,009.80 = 1,297.12 : x
  2. Step 2: Convert to fraction form
    1,331.68/2,009.80 = 1,297.12/x
  3. Step 3: Cross multiply
    1,331.68x = 2,009.80 × 1,297.12
  4. Step 4: Simplify right side
    1,331.68x = 2,606,951.78
  5. Step 5: Solve for x
    x = 2,606,951.78/1,331.68
  6. Step 6: Final answer
    x = 1,957.64

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.