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Finding the Fourth Proportional to 523.34, 721.60 and 392.12

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Solution

The fourth proportional to 523.34, 721.60 and 392.12 is: 540.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.34 : 721.60 = 392.12 : x
  2. Step 2: Convert to fraction form
    523.34/721.60 = 392.12/x
  3. Step 3: Cross multiply
    523.34x = 721.60 × 392.12
  4. Step 4: Simplify right side
    523.34x = 282,949.20
  5. Step 5: Solve for x
    x = 282,949.20/523.34
  6. Step 6: Final answer
    x = 540.67

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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.