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Finding the Fourth Proportional to 421.48, 581.62 and 234.99

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Solution

The fourth proportional to 421.48, 581.62 and 234.99 is: 324.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.48 : 581.62 = 234.99 : x
  2. Step 2: Convert to fraction form
    421.48/581.62 = 234.99/x
  3. Step 3: Cross multiply
    421.48x = 581.62 × 234.99
  4. Step 4: Simplify right side
    421.48x = 136,670.80
  5. Step 5: Solve for x
    x = 136,670.80/421.48
  6. Step 6: Final answer
    x = 324.27

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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.