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Finding the Fourth Proportional to 479.37, 661.85 and 368.64

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Solution

The fourth proportional to 479.37, 661.85 and 368.64 is: 508.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.37 : 661.85 = 368.64 : x
  2. Step 2: Convert to fraction form
    479.37/661.85 = 368.64/x
  3. Step 3: Cross multiply
    479.37x = 661.85 × 368.64
  4. Step 4: Simplify right side
    479.37x = 243,982.54
  5. Step 5: Solve for x
    x = 243,982.54/479.37
  6. Step 6: Final answer
    x = 508.96

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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.