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Finding the Fourth Proportional to 582.80, 804.28 and 320.84

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Solution

The fourth proportional to 582.80, 804.28 and 320.84 is: 442.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.80 : 804.28 = 320.84 : x
  2. Step 2: Convert to fraction form
    582.80/804.28 = 320.84/x
  3. Step 3: Cross multiply
    582.80x = 804.28 × 320.84
  4. Step 4: Simplify right side
    582.80x = 258,045.20
  5. Step 5: Solve for x
    x = 258,045.20/582.80
  6. Step 6: Final answer
    x = 442.77

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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.