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Finding the Fourth Proportional to 582.58, 803.28 and 395.92

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Solution

The fourth proportional to 582.58, 803.28 and 395.92 is: 545.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.58 : 803.28 = 395.92 : x
  2. Step 2: Convert to fraction form
    582.58/803.28 = 395.92/x
  3. Step 3: Cross multiply
    582.58x = 803.28 × 395.92
  4. Step 4: Simplify right side
    582.58x = 318,034.62
  5. Step 5: Solve for x
    x = 318,034.62/582.58
  6. Step 6: Final answer
    x = 545.91

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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.