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Finding the Fourth Proportional to 1,218.65, 1,827.97 and 488.23

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Solution

The fourth proportional to 1,218.65, 1,827.97 and 488.23 is: 732.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.65 : 1,827.97 = 488.23 : x
  2. Step 2: Convert to fraction form
    1,218.65/1,827.97 = 488.23/x
  3. Step 3: Cross multiply
    1,218.65x = 1,827.97 × 488.23
  4. Step 4: Simplify right side
    1,218.65x = 892,464.00
  5. Step 5: Solve for x
    x = 892,464.00/1,218.65
  6. Step 6: Final answer
    x = 732.34

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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.