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Finding the Fourth Proportional to 419.08, 628.49 and 303.16

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Solution

The fourth proportional to 419.08, 628.49 and 303.16 is: 454.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.08 : 628.49 = 303.16 : x
  2. Step 2: Convert to fraction form
    419.08/628.49 = 303.16/x
  3. Step 3: Cross multiply
    419.08x = 628.49 × 303.16
  4. Step 4: Simplify right side
    419.08x = 190,533.03
  5. Step 5: Solve for x
    x = 190,533.03/419.08
  6. Step 6: Final answer
    x = 454.65

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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.