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Finding the Fourth Proportional to 419.06, 627.79 and 235.90

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Solution

The fourth proportional to 419.06, 627.79 and 235.90 is: 353.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.06 : 627.79 = 235.90 : x
  2. Step 2: Convert to fraction form
    419.06/627.79 = 235.90/x
  3. Step 3: Cross multiply
    419.06x = 627.79 × 235.90
  4. Step 4: Simplify right side
    419.06x = 148,095.66
  5. Step 5: Solve for x
    x = 148,095.66/419.06
  6. Step 6: Final answer
    x = 353.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.