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Finding the Fourth Proportional to 406.05, 560.29 and 240.21

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Solution

The fourth proportional to 406.05, 560.29 and 240.21 is: 331.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.05 : 560.29 = 240.21 : x
  2. Step 2: Convert to fraction form
    406.05/560.29 = 240.21/x
  3. Step 3: Cross multiply
    406.05x = 560.29 × 240.21
  4. Step 4: Simplify right side
    406.05x = 134,587.26
  5. Step 5: Solve for x
    x = 134,587.26/406.05
  6. Step 6: Final answer
    x = 331.45

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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.