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Finding the Fourth Proportional to 507.98, 701.16 and 321.42

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Solution

The fourth proportional to 507.98, 701.16 and 321.42 is: 443.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.98 : 701.16 = 321.42 : x
  2. Step 2: Convert to fraction form
    507.98/701.16 = 321.42/x
  3. Step 3: Cross multiply
    507.98x = 701.16 × 321.42
  4. Step 4: Simplify right side
    507.98x = 225,366.85
  5. Step 5: Solve for x
    x = 225,366.85/507.98
  6. Step 6: Final answer
    x = 443.65

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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.