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Finding the Fourth Proportional to 447.76, 673.56 and 384.40

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Solution

The fourth proportional to 447.76, 673.56 and 384.40 is: 578.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.76 : 673.56 = 384.40 : x
  2. Step 2: Convert to fraction form
    447.76/673.56 = 384.40/x
  3. Step 3: Cross multiply
    447.76x = 673.56 × 384.40
  4. Step 4: Simplify right side
    447.76x = 258,916.46
  5. Step 5: Solve for x
    x = 258,916.46/447.76
  6. Step 6: Final answer
    x = 578.25

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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.