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Finding the Fourth Proportional to 468.79, 703.38 and 427.07

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Solution

The fourth proportional to 468.79, 703.38 and 427.07 is: 640.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.79 : 703.38 = 427.07 : x
  2. Step 2: Convert to fraction form
    468.79/703.38 = 427.07/x
  3. Step 3: Cross multiply
    468.79x = 703.38 × 427.07
  4. Step 4: Simplify right side
    468.79x = 300,392.50
  5. Step 5: Solve for x
    x = 300,392.50/468.79
  6. Step 6: Final answer
    x = 640.78

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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.