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Finding the Fourth Proportional to 661.41, 913.83 and 522.59

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Solution

The fourth proportional to 661.41, 913.83 and 522.59 is: 722.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.41 : 913.83 = 522.59 : x
  2. Step 2: Convert to fraction form
    661.41/913.83 = 522.59/x
  3. Step 3: Cross multiply
    661.41x = 913.83 × 522.59
  4. Step 4: Simplify right side
    661.41x = 477,553.85
  5. Step 5: Solve for x
    x = 477,553.85/661.41
  6. Step 6: Final answer
    x = 722.02

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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.