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Finding the Fourth Proportional to 633.72, 950.85 and 429.06

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Solution

The fourth proportional to 633.72, 950.85 and 429.06 is: 643.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.72 : 950.85 = 429.06 : x
  2. Step 2: Convert to fraction form
    633.72/950.85 = 429.06/x
  3. Step 3: Cross multiply
    633.72x = 950.85 × 429.06
  4. Step 4: Simplify right side
    633.72x = 407,971.70
  5. Step 5: Solve for x
    x = 407,971.70/633.72
  6. Step 6: Final answer
    x = 643.77

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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.