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Finding the Fourth Proportional to 729.81, 1,094.91 and 405.41

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Solution

The fourth proportional to 729.81, 1,094.91 and 405.41 is: 608.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.81 : 1,094.91 = 405.41 : x
  2. Step 2: Convert to fraction form
    729.81/1,094.91 = 405.41/x
  3. Step 3: Cross multiply
    729.81x = 1,094.91 × 405.41
  4. Step 4: Simplify right side
    729.81x = 443,881.99
  5. Step 5: Solve for x
    x = 443,881.99/729.81
  6. Step 6: Final answer
    x = 608.22

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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.