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Finding the Fourth Proportional to 557.50, 769.36 and 324.64

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Solution

The fourth proportional to 557.50, 769.36 and 324.64 is: 448.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.50 : 769.36 = 324.64 : x
  2. Step 2: Convert to fraction form
    557.50/769.36 = 324.64/x
  3. Step 3: Cross multiply
    557.50x = 769.36 × 324.64
  4. Step 4: Simplify right side
    557.50x = 249,765.03
  5. Step 5: Solve for x
    x = 249,765.03/557.50
  6. Step 6: Final answer
    x = 448.01

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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.