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Finding the Fourth Proportional to 582.79, 804.26 and 320.80

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Solution

The fourth proportional to 582.79, 804.26 and 320.80 is: 442.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.79 : 804.26 = 320.80 : x
  2. Step 2: Convert to fraction form
    582.79/804.26 = 320.80/x
  3. Step 3: Cross multiply
    582.79x = 804.26 × 320.80
  4. Step 4: Simplify right side
    582.79x = 258,006.61
  5. Step 5: Solve for x
    x = 258,006.61/582.79
  6. Step 6: Final answer
    x = 442.71

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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.