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Finding the Fourth Proportional to 1,814.91, 2,720.85 and 841.71

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Solution

The fourth proportional to 1,814.91, 2,720.85 and 841.71 is: 1,261.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,814.91 : 2,720.85 = 841.71 : x
  2. Step 2: Convert to fraction form
    1,814.91/2,720.85 = 841.71/x
  3. Step 3: Cross multiply
    1,814.91x = 2,720.85 × 841.71
  4. Step 4: Simplify right side
    1,814.91x = 2,290,166.65
  5. Step 5: Solve for x
    x = 2,290,166.65/1,814.91
  6. Step 6: Final answer
    x = 1,261.86

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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.