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Finding the Fourth Proportional to 1,221, 1,827.26 and 999.06

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Solution

The fourth proportional to 1,221, 1,827.26 and 999.06 is: 1,495.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221 : 1,827.26 = 999.06 : x
  2. Step 2: Convert to fraction form
    1,221/1,827.26 = 999.06/x
  3. Step 3: Cross multiply
    1,221x = 1,827.26 × 999.06
  4. Step 4: Simplify right side
    1,221x = 1,825,537.38
  5. Step 5: Solve for x
    x = 1,825,537.38/1,221
  6. Step 6: Final answer
    x = 1,495.12

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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.