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Finding the Fourth Proportional to 428.99, 592.04 and 239.95

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Solution

The fourth proportional to 428.99, 592.04 and 239.95 is: 331.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.99 : 592.04 = 239.95 : x
  2. Step 2: Convert to fraction form
    428.99/592.04 = 239.95/x
  3. Step 3: Cross multiply
    428.99x = 592.04 × 239.95
  4. Step 4: Simplify right side
    428.99x = 142,063.00
  5. Step 5: Solve for x
    x = 142,063.00/428.99
  6. Step 6: Final answer
    x = 331.15

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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.