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Finding the Fourth Proportional to 1,321.00, 1,823.04 and 731.54

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Solution

The fourth proportional to 1,321.00, 1,823.04 and 731.54 is: 1,009.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.00 : 1,823.04 = 731.54 : x
  2. Step 2: Convert to fraction form
    1,321.00/1,823.04 = 731.54/x
  3. Step 3: Cross multiply
    1,321.00x = 1,823.04 × 731.54
  4. Step 4: Simplify right side
    1,321.00x = 1,333,618.93
  5. Step 5: Solve for x
    x = 1,333,618.93/1,321.00
  6. Step 6: Final answer
    x = 1,009.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.