Home / 2,142.36-2,956.50-1,210.68

Finding the Fourth Proportional to 2,142.36, 2,956.50 and 1,210.68

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Solution

The fourth proportional to 2,142.36, 2,956.50 and 1,210.68 is: 1,670.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.36 : 2,956.50 = 1,210.68 : x
  2. Step 2: Convert to fraction form
    2,142.36/2,956.50 = 1,210.68/x
  3. Step 3: Cross multiply
    2,142.36x = 2,956.50 × 1,210.68
  4. Step 4: Simplify right side
    2,142.36x = 3,579,375.42
  5. Step 5: Solve for x
    x = 3,579,375.42/2,142.36
  6. Step 6: Final answer
    x = 1,670.76

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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.