Home / 1,292.43-1,939.41-512.51

Finding the Fourth Proportional to 1,292.43, 1,939.41 and 512.51

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Solution

The fourth proportional to 1,292.43, 1,939.41 and 512.51 is: 769.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.43 : 1,939.41 = 512.51 : x
  2. Step 2: Convert to fraction form
    1,292.43/1,939.41 = 512.51/x
  3. Step 3: Cross multiply
    1,292.43x = 1,939.41 × 512.51
  4. Step 4: Simplify right side
    1,292.43x = 993,967.02
  5. Step 5: Solve for x
    x = 993,967.02/1,292.43
  6. Step 6: Final answer
    x = 769.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.