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Finding the Fourth Proportional to 617.45, 852.20 and 368.65

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Solution

The fourth proportional to 617.45, 852.20 and 368.65 is: 508.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.45 : 852.20 = 368.65 : x
  2. Step 2: Convert to fraction form
    617.45/852.20 = 368.65/x
  3. Step 3: Cross multiply
    617.45x = 852.20 × 368.65
  4. Step 4: Simplify right side
    617.45x = 314,163.53
  5. Step 5: Solve for x
    x = 314,163.53/617.45
  6. Step 6: Final answer
    x = 508.81

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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.