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Finding the Fourth Proportional to 524.89, 724.26 and 393.67

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Solution

The fourth proportional to 524.89, 724.26 and 393.67 is: 543.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.89 : 724.26 = 393.67 : x
  2. Step 2: Convert to fraction form
    524.89/724.26 = 393.67/x
  3. Step 3: Cross multiply
    524.89x = 724.26 × 393.67
  4. Step 4: Simplify right side
    524.89x = 285,119.43
  5. Step 5: Solve for x
    x = 285,119.43/524.89
  6. Step 6: Final answer
    x = 543.20

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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.