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Finding the Fourth Proportional to 547.60, 819.60 and 385.60

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Solution

The fourth proportional to 547.60, 819.60 and 385.60 is: 577.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.60 : 819.60 = 385.60 : x
  2. Step 2: Convert to fraction form
    547.60/819.60 = 385.60/x
  3. Step 3: Cross multiply
    547.60x = 819.60 × 385.60
  4. Step 4: Simplify right side
    547.60x = 316,037.76
  5. Step 5: Solve for x
    x = 316,037.76/547.60
  6. Step 6: Final answer
    x = 577.13

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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.