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Finding the Fourth Proportional to 585.28, 807.69 and 319.73

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Solution

The fourth proportional to 585.28, 807.69 and 319.73 is: 441.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.28 : 807.69 = 319.73 : x
  2. Step 2: Convert to fraction form
    585.28/807.69 = 319.73/x
  3. Step 3: Cross multiply
    585.28x = 807.69 × 319.73
  4. Step 4: Simplify right side
    585.28x = 258,239.04
  5. Step 5: Solve for x
    x = 258,239.04/585.28
  6. Step 6: Final answer
    x = 441.22

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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.