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Finding the Fourth Proportional to 1,324.36, 1,827.56 and 764.80

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Solution

The fourth proportional to 1,324.36, 1,827.56 and 764.80 is: 1,055.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.36 : 1,827.56 = 764.80 : x
  2. Step 2: Convert to fraction form
    1,324.36/1,827.56 = 764.80/x
  3. Step 3: Cross multiply
    1,324.36x = 1,827.56 × 764.80
  4. Step 4: Simplify right side
    1,324.36x = 1,397,717.89
  5. Step 5: Solve for x
    x = 1,397,717.89/1,324.36
  6. Step 6: Final answer
    x = 1,055.39

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1.5x scale

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.