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Finding the Fourth Proportional to 546.60, 820.29 and 392.79

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Solution

The fourth proportional to 546.60, 820.29 and 392.79 is: 589.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.60 : 820.29 = 392.79 : x
  2. Step 2: Convert to fraction form
    546.60/820.29 = 392.79/x
  3. Step 3: Cross multiply
    546.60x = 820.29 × 392.79
  4. Step 4: Simplify right side
    546.60x = 322,201.71
  5. Step 5: Solve for x
    x = 322,201.71/546.60
  6. Step 6: Final answer
    x = 589.47

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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.