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Finding the Fourth Proportional to 1,828.93, 2,742.90 and 512.61

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Solution

The fourth proportional to 1,828.93, 2,742.90 and 512.61 is: 768.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,828.93 : 2,742.90 = 512.61 : x
  2. Step 2: Convert to fraction form
    1,828.93/2,742.90 = 512.61/x
  3. Step 3: Cross multiply
    1,828.93x = 2,742.90 × 512.61
  4. Step 4: Simplify right side
    1,828.93x = 1,406,033.03
  5. Step 5: Solve for x
    x = 1,406,033.03/1,828.93
  6. Step 6: Final answer
    x = 768.77

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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.