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Finding the Fourth Proportional to 479.56, 719.33 and 317.20

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Solution

The fourth proportional to 479.56, 719.33 and 317.20 is: 475.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.56 : 719.33 = 317.20 : x
  2. Step 2: Convert to fraction form
    479.56/719.33 = 317.20/x
  3. Step 3: Cross multiply
    479.56x = 719.33 × 317.20
  4. Step 4: Simplify right side
    479.56x = 228,171.48
  5. Step 5: Solve for x
    x = 228,171.48/479.56
  6. Step 6: Final answer
    x = 475.79

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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.