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Finding the Fourth Proportional to 546.60, 818.10 and 424.20

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Solution

The fourth proportional to 546.60, 818.10 and 424.20 is: 634.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.60 : 818.10 = 424.20 : x
  2. Step 2: Convert to fraction form
    546.60/818.10 = 424.20/x
  3. Step 3: Cross multiply
    546.60x = 818.10 × 424.20
  4. Step 4: Simplify right side
    546.60x = 347,038.02
  5. Step 5: Solve for x
    x = 347,038.02/546.60
  6. Step 6: Final answer
    x = 634.90

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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.