Home / 2,331.08-3,215.66-1,386.20

Finding the Fourth Proportional to 2,331.08, 3,215.66 and 1,386.20

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Solution

The fourth proportional to 2,331.08, 3,215.66 and 1,386.20 is: 1,912.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,331.08 : 3,215.66 = 1,386.20 : x
  2. Step 2: Convert to fraction form
    2,331.08/3,215.66 = 1,386.20/x
  3. Step 3: Cross multiply
    2,331.08x = 3,215.66 × 1,386.20
  4. Step 4: Simplify right side
    2,331.08x = 4,457,534.81
  5. Step 5: Solve for x
    x = 4,457,534.81/2,331.08
  6. Step 6: Final answer
    x = 1,912.22

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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.