Home / 2,980.19-4,112.56-1,801.06

Finding the Fourth Proportional to 2,980.19, 4,112.56 and 1,801.06

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Solution

The fourth proportional to 2,980.19, 4,112.56 and 1,801.06 is: 2,485.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.19 : 4,112.56 = 1,801.06 : x
  2. Step 2: Convert to fraction form
    2,980.19/4,112.56 = 1,801.06/x
  3. Step 3: Cross multiply
    2,980.19x = 4,112.56 × 1,801.06
  4. Step 4: Simplify right side
    2,980.19x = 7,406,967.31
  5. Step 5: Solve for x
    x = 7,406,967.31/2,980.19
  6. Step 6: Final answer
    x = 2,485.40

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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.