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Finding the Fourth Proportional to 434.21, 651.11 and 251.66

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Solution

The fourth proportional to 434.21, 651.11 and 251.66 is: 377.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.21 : 651.11 = 251.66 : x
  2. Step 2: Convert to fraction form
    434.21/651.11 = 251.66/x
  3. Step 3: Cross multiply
    434.21x = 651.11 × 251.66
  4. Step 4: Simplify right side
    434.21x = 163,854.46
  5. Step 5: Solve for x
    x = 163,854.46/434.21
  6. Step 6: Final answer
    x = 377.36

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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.