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Finding the Fourth Proportional to 554.20, 832.10 and 311.20

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Solution

The fourth proportional to 554.20, 832.10 and 311.20 is: 467.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.20 : 832.10 = 311.20 : x
  2. Step 2: Convert to fraction form
    554.20/832.10 = 311.20/x
  3. Step 3: Cross multiply
    554.20x = 832.10 × 311.20
  4. Step 4: Simplify right side
    554.20x = 258,949.52
  5. Step 5: Solve for x
    x = 258,949.52/554.20
  6. Step 6: Final answer
    x = 467.25

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.