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Finding the Fourth Proportional to 558.48, 771.66 and 538.77

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Solution

The fourth proportional to 558.48, 771.66 and 538.77 is: 744.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.48 : 771.66 = 538.77 : x
  2. Step 2: Convert to fraction form
    558.48/771.66 = 538.77/x
  3. Step 3: Cross multiply
    558.48x = 771.66 × 538.77
  4. Step 4: Simplify right side
    558.48x = 415,742.34
  5. Step 5: Solve for x
    x = 415,742.34/558.48
  6. Step 6: Final answer
    x = 744.42

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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.