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Finding the Fourth Proportional to 390.69, 582.66 and 363.35

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Solution

The fourth proportional to 390.69, 582.66 and 363.35 is: 541.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.69 : 582.66 = 363.35 : x
  2. Step 2: Convert to fraction form
    390.69/582.66 = 363.35/x
  3. Step 3: Cross multiply
    390.69x = 582.66 × 363.35
  4. Step 4: Simplify right side
    390.69x = 211,710.97
  5. Step 5: Solve for x
    x = 211,710.97/390.69
  6. Step 6: Final answer
    x = 541.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.