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Finding the Fourth Proportional to 557.34, 769.14 and 439.48

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Solution

The fourth proportional to 557.34, 769.14 and 439.48 is: 606.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.34 : 769.14 = 439.48 : x
  2. Step 2: Convert to fraction form
    557.34/769.14 = 439.48/x
  3. Step 3: Cross multiply
    557.34x = 769.14 × 439.48
  4. Step 4: Simplify right side
    557.34x = 338,021.65
  5. Step 5: Solve for x
    x = 338,021.65/557.34
  6. Step 6: Final answer
    x = 606.49

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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.