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Finding the Fourth Proportional to 479.62, 719.99 and 383.30

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Solution

The fourth proportional to 479.62, 719.99 and 383.30 is: 575.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.62 : 719.99 = 383.30 : x
  2. Step 2: Convert to fraction form
    479.62/719.99 = 383.30/x
  3. Step 3: Cross multiply
    479.62x = 719.99 × 383.30
  4. Step 4: Simplify right side
    479.62x = 275,970.79
  5. Step 5: Solve for x
    x = 275,970.79/479.62
  6. Step 6: Final answer
    x = 575.39

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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.