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Finding the Fourth Proportional to 617.47, 926.21 and 206.57

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Solution

The fourth proportional to 617.47, 926.21 and 206.57 is: 309.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.47 : 926.21 = 206.57 : x
  2. Step 2: Convert to fraction form
    617.47/926.21 = 206.57/x
  3. Step 3: Cross multiply
    617.47x = 926.21 × 206.57
  4. Step 4: Simplify right side
    617.47x = 191,328.48
  5. Step 5: Solve for x
    x = 191,328.48/617.47
  6. Step 6: Final answer
    x = 309.86

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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.