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Finding the Fourth Proportional to 617.91, 926.79 and 309.70

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Solution

The fourth proportional to 617.91, 926.79 and 309.70 is: 464.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.91 : 926.79 = 309.70 : x
  2. Step 2: Convert to fraction form
    617.91/926.79 = 309.70/x
  3. Step 3: Cross multiply
    617.91x = 926.79 × 309.70
  4. Step 4: Simplify right side
    617.91x = 287,026.86
  5. Step 5: Solve for x
    x = 287,026.86/617.91
  6. Step 6: Final answer
    x = 464.51

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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.