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Finding the Fourth Proportional to 546.58, 820.50 and 393.40

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Solution

The fourth proportional to 546.58, 820.50 and 393.40 is: 590.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.58 : 820.50 = 393.40 : x
  2. Step 2: Convert to fraction form
    546.58/820.50 = 393.40/x
  3. Step 3: Cross multiply
    546.58x = 820.50 × 393.40
  4. Step 4: Simplify right side
    546.58x = 322,784.70
  5. Step 5: Solve for x
    x = 322,784.70/546.58
  6. Step 6: Final answer
    x = 590.55

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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.