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Finding the Fourth Proportional to 825.90, 1,238.85 and 332.53

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Solution

The fourth proportional to 825.90, 1,238.85 and 332.53 is: 498.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.90 : 1,238.85 = 332.53 : x
  2. Step 2: Convert to fraction form
    825.90/1,238.85 = 332.53/x
  3. Step 3: Cross multiply
    825.90x = 1,238.85 × 332.53
  4. Step 4: Simplify right side
    825.90x = 411,953.13
  5. Step 5: Solve for x
    x = 411,953.13/825.90
  6. Step 6: Final answer
    x = 498.80

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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.