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Finding the Fourth Proportional to 418.91, 628.56 and 202.50

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Solution

The fourth proportional to 418.91, 628.56 and 202.50 is: 303.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.91 : 628.56 = 202.50 : x
  2. Step 2: Convert to fraction form
    418.91/628.56 = 202.50/x
  3. Step 3: Cross multiply
    418.91x = 628.56 × 202.50
  4. Step 4: Simplify right side
    418.91x = 127,283.40
  5. Step 5: Solve for x
    x = 127,283.40/418.91
  6. Step 6: Final answer
    x = 303.85

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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.