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Finding the Fourth Proportional to 538.47, 742.91 and 328.59

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Solution

The fourth proportional to 538.47, 742.91 and 328.59 is: 453.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.47 : 742.91 = 328.59 : x
  2. Step 2: Convert to fraction form
    538.47/742.91 = 328.59/x
  3. Step 3: Cross multiply
    538.47x = 742.91 × 328.59
  4. Step 4: Simplify right side
    538.47x = 244,111.15
  5. Step 5: Solve for x
    x = 244,111.15/538.47
  6. Step 6: Final answer
    x = 453.34

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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.