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Finding the Fourth Proportional to 629.04, 942.30 and 491.40

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Solution

The fourth proportional to 629.04, 942.30 and 491.40 is: 736.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.04 : 942.30 = 491.40 : x
  2. Step 2: Convert to fraction form
    629.04/942.30 = 491.40/x
  3. Step 3: Cross multiply
    629.04x = 942.30 × 491.40
  4. Step 4: Simplify right side
    629.04x = 463,046.22
  5. Step 5: Solve for x
    x = 463,046.22/629.04
  6. Step 6: Final answer
    x = 736.12

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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.