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Finding the Fourth Proportional to 627.12, 936.72 and 490.32

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Solution

The fourth proportional to 627.12, 936.72 and 490.32 is: 732.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.12 : 936.72 = 490.32 : x
  2. Step 2: Convert to fraction form
    627.12/936.72 = 490.32/x
  3. Step 3: Cross multiply
    627.12x = 936.72 × 490.32
  4. Step 4: Simplify right side
    627.12x = 459,292.55
  5. Step 5: Solve for x
    x = 459,292.55/627.12
  6. Step 6: Final answer
    x = 732.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.