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Finding the Fourth Proportional to 406.37, 561.53 and 289.73

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Solution

The fourth proportional to 406.37, 561.53 and 289.73 is: 400.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.37 : 561.53 = 289.73 : x
  2. Step 2: Convert to fraction form
    406.37/561.53 = 289.73/x
  3. Step 3: Cross multiply
    406.37x = 561.53 × 289.73
  4. Step 4: Simplify right side
    406.37x = 162,692.09
  5. Step 5: Solve for x
    x = 162,692.09/406.37
  6. Step 6: Final answer
    x = 400.35

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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.