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Finding the Fourth Proportional to 582.75, 804.22 and 320.78

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Solution

The fourth proportional to 582.75, 804.22 and 320.78 is: 442.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.75 : 804.22 = 320.78 : x
  2. Step 2: Convert to fraction form
    582.75/804.22 = 320.78/x
  3. Step 3: Cross multiply
    582.75x = 804.22 × 320.78
  4. Step 4: Simplify right side
    582.75x = 257,978.90
  5. Step 5: Solve for x
    x = 257,978.90/582.75
  6. Step 6: Final answer
    x = 442.69

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Double scale
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1.5x scale

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.