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Finding the Fourth Proportional to 479.49, 719.59 and 384.45

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Solution

The fourth proportional to 479.49, 719.59 and 384.45 is: 576.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.49 : 719.59 = 384.45 : x
  2. Step 2: Convert to fraction form
    479.49/719.59 = 384.45/x
  3. Step 3: Cross multiply
    479.49x = 719.59 × 384.45
  4. Step 4: Simplify right side
    479.49x = 276,646.38
  5. Step 5: Solve for x
    x = 276,646.38/479.49
  6. Step 6: Final answer
    x = 576.96

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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.