Home / 2,160.42-2,981.40-1,216.26

Finding the Fourth Proportional to 2,160.42, 2,981.40 and 1,216.26

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Solution

The fourth proportional to 2,160.42, 2,981.40 and 1,216.26 is: 1,678.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.42 : 2,981.40 = 1,216.26 : x
  2. Step 2: Convert to fraction form
    2,160.42/2,981.40 = 1,216.26/x
  3. Step 3: Cross multiply
    2,160.42x = 2,981.40 × 1,216.26
  4. Step 4: Simplify right side
    2,160.42x = 3,626,157.56
  5. Step 5: Solve for x
    x = 3,626,157.56/2,160.42
  6. Step 6: Final answer
    x = 1,678.45

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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.