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Finding the Fourth Proportional to 450.32, 620.91 and 383.81

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Solution

The fourth proportional to 450.32, 620.91 and 383.81 is: 529.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.32 : 620.91 = 383.81 : x
  2. Step 2: Convert to fraction form
    450.32/620.91 = 383.81/x
  3. Step 3: Cross multiply
    450.32x = 620.91 × 383.81
  4. Step 4: Simplify right side
    450.32x = 238,308.36
  5. Step 5: Solve for x
    x = 238,308.36/450.32
  6. Step 6: Final answer
    x = 529.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.