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Finding the Fourth Proportional to 558.84, 771.17 and 310.15

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Solution

The fourth proportional to 558.84, 771.17 and 310.15 is: 427.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.84 : 771.17 = 310.15 : x
  2. Step 2: Convert to fraction form
    558.84/771.17 = 310.15/x
  3. Step 3: Cross multiply
    558.84x = 771.17 × 310.15
  4. Step 4: Simplify right side
    558.84x = 239,178.38
  5. Step 5: Solve for x
    x = 239,178.38/558.84
  6. Step 6: Final answer
    x = 427.99

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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.