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Finding the Fourth Proportional to 662.12, 913.77 and 382.40

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Solution

The fourth proportional to 662.12, 913.77 and 382.40 is: 527.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.12 : 913.77 = 382.40 : x
  2. Step 2: Convert to fraction form
    662.12/913.77 = 382.40/x
  3. Step 3: Cross multiply
    662.12x = 913.77 × 382.40
  4. Step 4: Simplify right side
    662.12x = 349,421.08
  5. Step 5: Solve for x
    x = 349,421.08/662.12
  6. Step 6: Final answer
    x = 527.73

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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.