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Finding the Fourth Proportional to 523.38, 784.53 and 280.20

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Solution

The fourth proportional to 523.38, 784.53 and 280.20 is: 420.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.38 : 784.53 = 280.20 : x
  2. Step 2: Convert to fraction form
    523.38/784.53 = 280.20/x
  3. Step 3: Cross multiply
    523.38x = 784.53 × 280.20
  4. Step 4: Simplify right side
    523.38x = 219,825.31
  5. Step 5: Solve for x
    x = 219,825.31/523.38
  6. Step 6: Final answer
    x = 420.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.