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Finding the Fourth Proportional to 406.77, 561.53 and 259.60

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Solution

The fourth proportional to 406.77, 561.53 and 259.60 is: 358.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.77 : 561.53 = 259.60 : x
  2. Step 2: Convert to fraction form
    406.77/561.53 = 259.60/x
  3. Step 3: Cross multiply
    406.77x = 561.53 × 259.60
  4. Step 4: Simplify right side
    406.77x = 145,773.19
  5. Step 5: Solve for x
    x = 145,773.19/406.77
  6. Step 6: Final answer
    x = 358.37

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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.