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Finding the Fourth Proportional to 671.90, 926.55 and 409.76

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Solution

The fourth proportional to 671.90, 926.55 and 409.76 is: 565.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.90 : 926.55 = 409.76 : x
  2. Step 2: Convert to fraction form
    671.90/926.55 = 409.76/x
  3. Step 3: Cross multiply
    671.90x = 926.55 × 409.76
  4. Step 4: Simplify right side
    671.90x = 379,658.50
  5. Step 5: Solve for x
    x = 379,658.50/671.90
  6. Step 6: Final answer
    x = 565.06

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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.