Home / 2,840.19-3,918.81-1,720.63

Finding the Fourth Proportional to 2,840.19, 3,918.81 and 1,720.63

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Solution

The fourth proportional to 2,840.19, 3,918.81 and 1,720.63 is: 2,374.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.19 : 3,918.81 = 1,720.63 : x
  2. Step 2: Convert to fraction form
    2,840.19/3,918.81 = 1,720.63/x
  3. Step 3: Cross multiply
    2,840.19x = 3,918.81 × 1,720.63
  4. Step 4: Simplify right side
    2,840.19x = 6,742,822.05
  5. Step 5: Solve for x
    x = 6,742,822.05/2,840.19
  6. Step 6: Final answer
    x = 2,374.07

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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.