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Finding the Fourth Proportional to 469.73, 646.60 and 406.69

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Solution

The fourth proportional to 469.73, 646.60 and 406.69 is: 559.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.73 : 646.60 = 406.69 : x
  2. Step 2: Convert to fraction form
    469.73/646.60 = 406.69/x
  3. Step 3: Cross multiply
    469.73x = 646.60 × 406.69
  4. Step 4: Simplify right side
    469.73x = 262,965.75
  5. Step 5: Solve for x
    x = 262,965.75/469.73
  6. Step 6: Final answer
    x = 559.82

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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.