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Finding the Fourth Proportional to 582.38, 803.68 and 320.39

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Solution

The fourth proportional to 582.38, 803.68 and 320.39 is: 442.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.38 : 803.68 = 320.39 : x
  2. Step 2: Convert to fraction form
    582.38/803.68 = 320.39/x
  3. Step 3: Cross multiply
    582.38x = 803.68 × 320.39
  4. Step 4: Simplify right side
    582.38x = 257,486.22
  5. Step 5: Solve for x
    x = 257,486.22/582.38
  6. Step 6: Final answer
    x = 442.13

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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.