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Finding the Fourth Proportional to 1,231.56, 1,847 and 354

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Solution

The fourth proportional to 1,231.56, 1,847 and 354 is: 530.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.56 : 1,847 = 354 : x
  2. Step 2: Convert to fraction form
    1,231.56/1,847 = 354/x
  3. Step 3: Cross multiply
    1,231.56x = 1,847 × 354
  4. Step 4: Simplify right side
    1,231.56x = 653,838
  5. Step 5: Solve for x
    x = 653,838/1,231.56
  6. Step 6: Final answer
    x = 530.90

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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.