Home / 2,188.40-3,019.45-1,292.16

Finding the Fourth Proportional to 2,188.40, 3,019.45 and 1,292.16

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Solution

The fourth proportional to 2,188.40, 3,019.45 and 1,292.16 is: 1,782.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.40 : 3,019.45 = 1,292.16 : x
  2. Step 2: Convert to fraction form
    2,188.40/3,019.45 = 1,292.16/x
  3. Step 3: Cross multiply
    2,188.40x = 3,019.45 × 1,292.16
  4. Step 4: Simplify right side
    2,188.40x = 3,901,619.52
  5. Step 5: Solve for x
    x = 3,901,619.52/2,188.40
  6. Step 6: Final answer
    x = 1,782.86

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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.