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Finding the Fourth Proportional to 592.31, 816.84 and 392.79

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Solution

The fourth proportional to 592.31, 816.84 and 392.79 is: 541.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    592.31 : 816.84 = 392.79 : x
  2. Step 2: Convert to fraction form
    592.31/816.84 = 392.79/x
  3. Step 3: Cross multiply
    592.31x = 816.84 × 392.79
  4. Step 4: Simplify right side
    592.31x = 320,846.58
  5. Step 5: Solve for x
    x = 320,846.58/592.31
  6. Step 6: Final answer
    x = 541.69

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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.