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Finding the Fourth Proportional to 419.72, 629.76 and 237.08

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Solution

The fourth proportional to 419.72, 629.76 and 237.08 is: 355.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.72 : 629.76 = 237.08 : x
  2. Step 2: Convert to fraction form
    419.72/629.76 = 237.08/x
  3. Step 3: Cross multiply
    419.72x = 629.76 × 237.08
  4. Step 4: Simplify right side
    419.72x = 149,303.50
  5. Step 5: Solve for x
    x = 149,303.50/419.72
  6. Step 6: Final answer
    x = 355.72

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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.