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Finding the Fourth Proportional to 524.31, 723.16 and 399.67

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Solution

The fourth proportional to 524.31, 723.16 and 399.67 is: 551.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.31 : 723.16 = 399.67 : x
  2. Step 2: Convert to fraction form
    524.31/723.16 = 399.67/x
  3. Step 3: Cross multiply
    524.31x = 723.16 × 399.67
  4. Step 4: Simplify right side
    524.31x = 289,024.05
  5. Step 5: Solve for x
    x = 289,024.05/524.31
  6. Step 6: Final answer
    x = 551.25

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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.