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Finding the Fourth Proportional to 419.01, 628.54 and 126.50

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Solution

The fourth proportional to 419.01, 628.54 and 126.50 is: 189.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.01 : 628.54 = 126.50 : x
  2. Step 2: Convert to fraction form
    419.01/628.54 = 126.50/x
  3. Step 3: Cross multiply
    419.01x = 628.54 × 126.50
  4. Step 4: Simplify right side
    419.01x = 79,507.17
  5. Step 5: Solve for x
    x = 79,507.17/419.01
  6. Step 6: Final answer
    x = 189.75

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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.