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Finding the Fourth Proportional to 671.45, 926.61 and 376.70

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Solution

The fourth proportional to 671.45, 926.61 and 376.70 is: 519.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.45 : 926.61 = 376.70 : x
  2. Step 2: Convert to fraction form
    671.45/926.61 = 376.70/x
  3. Step 3: Cross multiply
    671.45x = 926.61 × 376.70
  4. Step 4: Simplify right side
    671.45x = 349,053.99
  5. Step 5: Solve for x
    x = 349,053.99/671.45
  6. Step 6: Final answer
    x = 519.85

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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.