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Finding the Fourth Proportional to 538.94, 807.59 and 319.64

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Solution

The fourth proportional to 538.94, 807.59 and 319.64 is: 478.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.94 : 807.59 = 319.64 : x
  2. Step 2: Convert to fraction form
    538.94/807.59 = 319.64/x
  3. Step 3: Cross multiply
    538.94x = 807.59 × 319.64
  4. Step 4: Simplify right side
    538.94x = 258,132.43
  5. Step 5: Solve for x
    x = 258,132.43/538.94
  6. Step 6: Final answer
    x = 478.97

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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.