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Finding the Fourth Proportional to 507.56, 764.98 and 479.30

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Solution

The fourth proportional to 507.56, 764.98 and 479.30 is: 722.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.56 : 764.98 = 479.30 : x
  2. Step 2: Convert to fraction form
    507.56/764.98 = 479.30/x
  3. Step 3: Cross multiply
    507.56x = 764.98 × 479.30
  4. Step 4: Simplify right side
    507.56x = 366,654.91
  5. Step 5: Solve for x
    x = 366,654.91/507.56
  6. Step 6: Final answer
    x = 722.39

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.