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Finding the Fourth Proportional to 491.19, 735.97 and 429.63

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Solution

The fourth proportional to 491.19, 735.97 and 429.63 is: 643.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.19 : 735.97 = 429.63 : x
  2. Step 2: Convert to fraction form
    491.19/735.97 = 429.63/x
  3. Step 3: Cross multiply
    491.19x = 735.97 × 429.63
  4. Step 4: Simplify right side
    491.19x = 316,194.79
  5. Step 5: Solve for x
    x = 316,194.79/491.19
  6. Step 6: Final answer
    x = 643.73

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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.