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Finding the Fourth Proportional to 488.90, 674.52 and 314.34

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Solution

The fourth proportional to 488.90, 674.52 and 314.34 is: 433.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.90 : 674.52 = 314.34 : x
  2. Step 2: Convert to fraction form
    488.90/674.52 = 314.34/x
  3. Step 3: Cross multiply
    488.90x = 674.52 × 314.34
  4. Step 4: Simplify right side
    488.90x = 212,028.62
  5. Step 5: Solve for x
    x = 212,028.62/488.90
  6. Step 6: Final answer
    x = 433.69

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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.