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Finding the Fourth Proportional to 354.14, 530.79 and 251.47

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Solution

The fourth proportional to 354.14, 530.79 and 251.47 is: 376.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.14 : 530.79 = 251.47 : x
  2. Step 2: Convert to fraction form
    354.14/530.79 = 251.47/x
  3. Step 3: Cross multiply
    354.14x = 530.79 × 251.47
  4. Step 4: Simplify right side
    354.14x = 133,477.48
  5. Step 5: Solve for x
    x = 133,477.48/354.14
  6. Step 6: Final answer
    x = 376.91

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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.