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Finding the Fourth Proportional to 523.16, 784.82 and 157.90

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Solution

The fourth proportional to 523.16, 784.82 and 157.90 is: 236.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.16 : 784.82 = 157.90 : x
  2. Step 2: Convert to fraction form
    523.16/784.82 = 157.90/x
  3. Step 3: Cross multiply
    523.16x = 784.82 × 157.90
  4. Step 4: Simplify right side
    523.16x = 123,923.08
  5. Step 5: Solve for x
    x = 123,923.08/523.16
  6. Step 6: Final answer
    x = 236.87

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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.