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Finding the Fourth Proportional to 558.27, 770.09 and 345.66

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Solution

The fourth proportional to 558.27, 770.09 and 345.66 is: 476.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.27 : 770.09 = 345.66 : x
  2. Step 2: Convert to fraction form
    558.27/770.09 = 345.66/x
  3. Step 3: Cross multiply
    558.27x = 770.09 × 345.66
  4. Step 4: Simplify right side
    558.27x = 266,190.47
  5. Step 5: Solve for x
    x = 266,190.47/558.27
  6. Step 6: Final answer
    x = 476.81

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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.