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Finding the Fourth Proportional to 1,918.04, 2,876.88 and 822.20

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Solution

The fourth proportional to 1,918.04, 2,876.88 and 822.20 is: 1,233.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.04 : 2,876.88 = 822.20 : x
  2. Step 2: Convert to fraction form
    1,918.04/2,876.88 = 822.20/x
  3. Step 3: Cross multiply
    1,918.04x = 2,876.88 × 822.20
  4. Step 4: Simplify right side
    1,918.04x = 2,365,370.74
  5. Step 5: Solve for x
    x = 2,365,370.74/1,918.04
  6. Step 6: Final answer
    x = 1,233.22

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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.