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Finding the Fourth Proportional to 334.98, 501.60 and 212.88

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Solution

The fourth proportional to 334.98, 501.60 and 212.88 is: 318.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.98 : 501.60 = 212.88 : x
  2. Step 2: Convert to fraction form
    334.98/501.60 = 212.88/x
  3. Step 3: Cross multiply
    334.98x = 501.60 × 212.88
  4. Step 4: Simplify right side
    334.98x = 106,780.61
  5. Step 5: Solve for x
    x = 106,780.61/334.98
  6. Step 6: Final answer
    x = 318.77

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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.