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Finding the Fourth Proportional to 479.36, 719.36 and 317.12

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Solution

The fourth proportional to 479.36, 719.36 and 317.12 is: 475.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.36 : 719.36 = 317.12 : x
  2. Step 2: Convert to fraction form
    479.36/719.36 = 317.12/x
  3. Step 3: Cross multiply
    479.36x = 719.36 × 317.12
  4. Step 4: Simplify right side
    479.36x = 228,123.44
  5. Step 5: Solve for x
    x = 228,123.44/479.36
  6. Step 6: Final answer
    x = 475.89

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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.