Home / 2,130.24-2,939.70-1,245.87

Finding the Fourth Proportional to 2,130.24, 2,939.70 and 1,245.87

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Solution

The fourth proportional to 2,130.24, 2,939.70 and 1,245.87 is: 1,719.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.24 : 2,939.70 = 1,245.87 : x
  2. Step 2: Convert to fraction form
    2,130.24/2,939.70 = 1,245.87/x
  3. Step 3: Cross multiply
    2,130.24x = 2,939.70 × 1,245.87
  4. Step 4: Simplify right side
    2,130.24x = 3,662,484.04
  5. Step 5: Solve for x
    x = 3,662,484.04/2,130.24
  6. Step 6: Final answer
    x = 1,719.28

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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.