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Finding the Fourth Proportional to 763.26, 1,145.04 and 352.49

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Solution

The fourth proportional to 763.26, 1,145.04 and 352.49 is: 528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.26 : 1,145.04 = 352.49 : x
  2. Step 2: Convert to fraction form
    763.26/1,145.04 = 352.49/x
  3. Step 3: Cross multiply
    763.26x = 1,145.04 × 352.49
  4. Step 4: Simplify right side
    763.26x = 403,608.10
  5. Step 5: Solve for x
    x = 403,608.10/763.26
  6. Step 6: Final answer
    x = 528.80

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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.