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Finding the Fourth Proportional to 479.58, 661.80 and 304.75

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Solution

The fourth proportional to 479.58, 661.80 and 304.75 is: 420.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.58 : 661.80 = 304.75 : x
  2. Step 2: Convert to fraction form
    479.58/661.80 = 304.75/x
  3. Step 3: Cross multiply
    479.58x = 661.80 × 304.75
  4. Step 4: Simplify right side
    479.58x = 201,683.55
  5. Step 5: Solve for x
    x = 201,683.55/479.58
  6. Step 6: Final answer
    x = 420.54

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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.