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Finding the Fourth Proportional to 558.72, 770.54 and 453.78

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Solution

The fourth proportional to 558.72, 770.54 and 453.78 is: 625.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.72 : 770.54 = 453.78 : x
  2. Step 2: Convert to fraction form
    558.72/770.54 = 453.78/x
  3. Step 3: Cross multiply
    558.72x = 770.54 × 453.78
  4. Step 4: Simplify right side
    558.72x = 349,653.37
  5. Step 5: Solve for x
    x = 349,653.37/558.72
  6. Step 6: Final answer
    x = 625.81

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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.