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Finding the Fourth Proportional to 523.65, 782.46 and 399.54

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Solution

The fourth proportional to 523.65, 782.46 and 399.54 is: 597.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.65 : 782.46 = 399.54 : x
  2. Step 2: Convert to fraction form
    523.65/782.46 = 399.54/x
  3. Step 3: Cross multiply
    523.65x = 782.46 × 399.54
  4. Step 4: Simplify right side
    523.65x = 312,624.07
  5. Step 5: Solve for x
    x = 312,624.07/523.65
  6. Step 6: Final answer
    x = 597.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.