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Finding the Fourth Proportional to 419.68, 578.80 and 301.60

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Solution

The fourth proportional to 419.68, 578.80 and 301.60 is: 415.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.68 : 578.80 = 301.60 : x
  2. Step 2: Convert to fraction form
    419.68/578.80 = 301.60/x
  3. Step 3: Cross multiply
    419.68x = 578.80 × 301.60
  4. Step 4: Simplify right side
    419.68x = 174,563.86
  5. Step 5: Solve for x
    x = 174,563.86/419.68
  6. Step 6: Final answer
    x = 415.94

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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.