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Finding the Fourth Proportional to 523.99, 723.13 and 287.94

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Solution

The fourth proportional to 523.99, 723.13 and 287.94 is: 397.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.99 : 723.13 = 287.94 : x
  2. Step 2: Convert to fraction form
    523.99/723.13 = 287.94/x
  3. Step 3: Cross multiply
    523.99x = 723.13 × 287.94
  4. Step 4: Simplify right side
    523.99x = 208,220.04
  5. Step 5: Solve for x
    x = 208,220.04/523.99
  6. Step 6: Final answer
    x = 397.37

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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.