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Finding the Fourth Proportional to 1,858.08, 2,786.88 and 818.82

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Solution

The fourth proportional to 1,858.08, 2,786.88 and 818.82 is: 1,228.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,858.08 : 2,786.88 = 818.82 : x
  2. Step 2: Convert to fraction form
    1,858.08/2,786.88 = 818.82/x
  3. Step 3: Cross multiply
    1,858.08x = 2,786.88 × 818.82
  4. Step 4: Simplify right side
    1,858.08x = 2,281,953.08
  5. Step 5: Solve for x
    x = 2,281,953.08/1,858.08
  6. Step 6: Final answer
    x = 1,228.12

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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.