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Finding the Fourth Proportional to 662.15, 913.89 and 382.35

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Solution

The fourth proportional to 662.15, 913.89 and 382.35 is: 527.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.15 : 913.89 = 382.35 : x
  2. Step 2: Convert to fraction form
    662.15/913.89 = 382.35/x
  3. Step 3: Cross multiply
    662.15x = 913.89 × 382.35
  4. Step 4: Simplify right side
    662.15x = 349,419.36
  5. Step 5: Solve for x
    x = 349,419.36/662.15
  6. Step 6: Final answer
    x = 527.70

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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.