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Finding the Fourth Proportional to 558.95, 771.35 and 310.27

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Solution

The fourth proportional to 558.95, 771.35 and 310.27 is: 428.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.95 : 771.35 = 310.27 : x
  2. Step 2: Convert to fraction form
    558.95/771.35 = 310.27/x
  3. Step 3: Cross multiply
    558.95x = 771.35 × 310.27
  4. Step 4: Simplify right side
    558.95x = 239,326.76
  5. Step 5: Solve for x
    x = 239,326.76/558.95
  6. Step 6: Final answer
    x = 428.17

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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.