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Finding the Fourth Proportional to 558.85, 771.16 and 310.17

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Solution

The fourth proportional to 558.85, 771.16 and 310.17 is: 428.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.85 : 771.16 = 310.17 : x
  2. Step 2: Convert to fraction form
    558.85/771.16 = 310.17/x
  3. Step 3: Cross multiply
    558.85x = 771.16 × 310.17
  4. Step 4: Simplify right side
    558.85x = 239,194.38
  5. Step 5: Solve for x
    x = 239,194.38/558.85
  6. Step 6: Final answer
    x = 428.01

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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.