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Finding the Fourth Proportional to 488.76, 674.36 and 314.21

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Solution

The fourth proportional to 488.76, 674.36 and 314.21 is: 433.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.76 : 674.36 = 314.21 : x
  2. Step 2: Convert to fraction form
    488.76/674.36 = 314.21/x
  3. Step 3: Cross multiply
    488.76x = 674.36 × 314.21
  4. Step 4: Simplify right side
    488.76x = 211,885.71
  5. Step 5: Solve for x
    x = 211,885.71/488.76
  6. Step 6: Final answer
    x = 433.52

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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.