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Finding the Fourth Proportional to 429.85, 647.05 and 367.21

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Solution

The fourth proportional to 429.85, 647.05 and 367.21 is: 552.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.85 : 647.05 = 367.21 : x
  2. Step 2: Convert to fraction form
    429.85/647.05 = 367.21/x
  3. Step 3: Cross multiply
    429.85x = 647.05 × 367.21
  4. Step 4: Simplify right side
    429.85x = 237,603.23
  5. Step 5: Solve for x
    x = 237,603.23/429.85
  6. Step 6: Final answer
    x = 552.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.