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Finding the Fourth Proportional to 418.16, 627.75 and 303.35

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Solution

The fourth proportional to 418.16, 627.75 and 303.35 is: 455.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.16 : 627.75 = 303.35 : x
  2. Step 2: Convert to fraction form
    418.16/627.75 = 303.35/x
  3. Step 3: Cross multiply
    418.16x = 627.75 × 303.35
  4. Step 4: Simplify right side
    418.16x = 190,424.82
  5. Step 5: Solve for x
    x = 190,424.82/418.16
  6. Step 6: Final answer
    x = 455.38

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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.