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Finding the Fourth Proportional to 684.36, 1,027.62 and 396

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Solution

The fourth proportional to 684.36, 1,027.62 and 396 is: 594.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.36 : 1,027.62 = 396 : x
  2. Step 2: Convert to fraction form
    684.36/1,027.62 = 396/x
  3. Step 3: Cross multiply
    684.36x = 1,027.62 × 396
  4. Step 4: Simplify right side
    684.36x = 406,937.52
  5. Step 5: Solve for x
    x = 406,937.52/684.36
  6. Step 6: Final answer
    x = 594.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.