Home / 2,187.80-3,018.16-1,303.08

Finding the Fourth Proportional to 2,187.80, 3,018.16 and 1,303.08

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Solution

The fourth proportional to 2,187.80, 3,018.16 and 1,303.08 is: 1,797.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.80 : 3,018.16 = 1,303.08 : x
  2. Step 2: Convert to fraction form
    2,187.80/3,018.16 = 1,303.08/x
  3. Step 3: Cross multiply
    2,187.80x = 3,018.16 × 1,303.08
  4. Step 4: Simplify right side
    2,187.80x = 3,932,903.93
  5. Step 5: Solve for x
    x = 3,932,903.93/2,187.80
  6. Step 6: Final answer
    x = 1,797.65

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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.