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Finding the Fourth Proportional to 477, 656.64 and 427.86

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Solution

The fourth proportional to 477, 656.64 and 427.86 is: 588.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    477 : 656.64 = 427.86 : x
  2. Step 2: Convert to fraction form
    477/656.64 = 427.86/x
  3. Step 3: Cross multiply
    477x = 656.64 × 427.86
  4. Step 4: Simplify right side
    477x = 280,949.99
  5. Step 5: Solve for x
    x = 280,949.99/477
  6. Step 6: Final answer
    x = 588.99

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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.