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Finding the Fourth Proportional to 557.58, 769.65 and 324.90

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Solution

The fourth proportional to 557.58, 769.65 and 324.90 is: 448.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.58 : 769.65 = 324.90 : x
  2. Step 2: Convert to fraction form
    557.58/769.65 = 324.90/x
  3. Step 3: Cross multiply
    557.58x = 769.65 × 324.90
  4. Step 4: Simplify right side
    557.58x = 250,059.29
  5. Step 5: Solve for x
    x = 250,059.29/557.58
  6. Step 6: Final answer
    x = 448.47

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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.