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Finding the Fourth Proportional to 557.07, 768.72 and 324.21

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Solution

The fourth proportional to 557.07, 768.72 and 324.21 is: 447.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.07 : 768.72 = 324.21 : x
  2. Step 2: Convert to fraction form
    557.07/768.72 = 324.21/x
  3. Step 3: Cross multiply
    557.07x = 768.72 × 324.21
  4. Step 4: Simplify right side
    557.07x = 249,226.71
  5. Step 5: Solve for x
    x = 249,226.71/557.07
  6. Step 6: Final answer
    x = 447.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.