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Finding the Fourth Proportional to 589.63, 814.37 and 392.80

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Solution

The fourth proportional to 589.63, 814.37 and 392.80 is: 542.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.63 : 814.37 = 392.80 : x
  2. Step 2: Convert to fraction form
    589.63/814.37 = 392.80/x
  3. Step 3: Cross multiply
    589.63x = 814.37 × 392.80
  4. Step 4: Simplify right side
    589.63x = 319,885.01
  5. Step 5: Solve for x
    x = 319,885.01/589.63
  6. Step 6: Final answer
    x = 542.52

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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.