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Finding the Fourth Proportional to 523.64, 722.89 and 405.35

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Solution

The fourth proportional to 523.64, 722.89 and 405.35 is: 559.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.64 : 722.89 = 405.35 : x
  2. Step 2: Convert to fraction form
    523.64/722.89 = 405.35/x
  3. Step 3: Cross multiply
    523.64x = 722.89 × 405.35
  4. Step 4: Simplify right side
    523.64x = 293,023.46
  5. Step 5: Solve for x
    x = 293,023.46/523.64
  6. Step 6: Final answer
    x = 559.59

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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.