Home / 2,160.16-2,980.92-1,215.96

Finding the Fourth Proportional to 2,160.16, 2,980.92 and 1,215.96

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Solution

The fourth proportional to 2,160.16, 2,980.92 and 1,215.96 is: 1,677.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.16 : 2,980.92 = 1,215.96 : x
  2. Step 2: Convert to fraction form
    2,160.16/2,980.92 = 1,215.96/x
  3. Step 3: Cross multiply
    2,160.16x = 2,980.92 × 1,215.96
  4. Step 4: Simplify right side
    2,160.16x = 3,624,679.48
  5. Step 5: Solve for x
    x = 3,624,679.48/2,160.16
  6. Step 6: Final answer
    x = 1,677.97

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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.