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Finding the Fourth Proportional to 419.08, 578.04 and 261.54

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Solution

The fourth proportional to 419.08, 578.04 and 261.54 is: 360.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.08 : 578.04 = 261.54 : x
  2. Step 2: Convert to fraction form
    419.08/578.04 = 261.54/x
  3. Step 3: Cross multiply
    419.08x = 578.04 × 261.54
  4. Step 4: Simplify right side
    419.08x = 151,180.58
  5. Step 5: Solve for x
    x = 151,180.58/419.08
  6. Step 6: Final answer
    x = 360.74

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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.