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Finding the Fourth Proportional to 406.33, 560.78 and 240.51

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Solution

The fourth proportional to 406.33, 560.78 and 240.51 is: 331.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.33 : 560.78 = 240.51 : x
  2. Step 2: Convert to fraction form
    406.33/560.78 = 240.51/x
  3. Step 3: Cross multiply
    406.33x = 560.78 × 240.51
  4. Step 4: Simplify right side
    406.33x = 134,873.20
  5. Step 5: Solve for x
    x = 134,873.20/406.33
  6. Step 6: Final answer
    x = 331.93

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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.