Home / 2,159.88-2,980.63-1,228.38

Finding the Fourth Proportional to 2,159.88, 2,980.63 and 1,228.38

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Solution

The fourth proportional to 2,159.88, 2,980.63 and 1,228.38 is: 1,695.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.88 : 2,980.63 = 1,228.38 : x
  2. Step 2: Convert to fraction form
    2,159.88/2,980.63 = 1,228.38/x
  3. Step 3: Cross multiply
    2,159.88x = 2,980.63 × 1,228.38
  4. Step 4: Simplify right side
    2,159.88x = 3,661,346.28
  5. Step 5: Solve for x
    x = 3,661,346.28/2,159.88
  6. Step 6: Final answer
    x = 1,695.16

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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.