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Finding the Fourth Proportional to 589.39, 813.60 and 392.83

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Solution

The fourth proportional to 589.39, 813.60 and 392.83 is: 542.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.39 : 813.60 = 392.83 : x
  2. Step 2: Convert to fraction form
    589.39/813.60 = 392.83/x
  3. Step 3: Cross multiply
    589.39x = 813.60 × 392.83
  4. Step 4: Simplify right side
    589.39x = 319,606.49
  5. Step 5: Solve for x
    x = 319,606.49/589.39
  6. Step 6: Final answer
    x = 542.27

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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.