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Finding the Fourth Proportional to 538.88, 808.40 and 173.68

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Solution

The fourth proportional to 538.88, 808.40 and 173.68 is: 260.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.88 : 808.40 = 173.68 : x
  2. Step 2: Convert to fraction form
    538.88/808.40 = 173.68/x
  3. Step 3: Cross multiply
    538.88x = 808.40 × 173.68
  4. Step 4: Simplify right side
    538.88x = 140,402.91
  5. Step 5: Solve for x
    x = 140,402.91/538.88
  6. Step 6: Final answer
    x = 260.55

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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.