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Finding the Fourth Proportional to 617.05, 851.55 and 368.38

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Solution

The fourth proportional to 617.05, 851.55 and 368.38 is: 508.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.05 : 851.55 = 368.38 : x
  2. Step 2: Convert to fraction form
    617.05/851.55 = 368.38/x
  3. Step 3: Cross multiply
    617.05x = 851.55 × 368.38
  4. Step 4: Simplify right side
    617.05x = 313,693.99
  5. Step 5: Solve for x
    x = 313,693.99/617.05
  6. Step 6: Final answer
    x = 508.38

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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.