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Finding the Fourth Proportional to 429.01, 643.81 and 307.37

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Solution

The fourth proportional to 429.01, 643.81 and 307.37 is: 461.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.01 : 643.81 = 307.37 : x
  2. Step 2: Convert to fraction form
    429.01/643.81 = 307.37/x
  3. Step 3: Cross multiply
    429.01x = 643.81 × 307.37
  4. Step 4: Simplify right side
    429.01x = 197,888.26
  5. Step 5: Solve for x
    x = 197,888.26/429.01
  6. Step 6: Final answer
    x = 461.27

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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.