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Finding the Fourth Proportional to 557.88, 769.40 and 336.79

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Solution

The fourth proportional to 557.88, 769.40 and 336.79 is: 464.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.88 : 769.40 = 336.79 : x
  2. Step 2: Convert to fraction form
    557.88/769.40 = 336.79/x
  3. Step 3: Cross multiply
    557.88x = 769.40 × 336.79
  4. Step 4: Simplify right side
    557.88x = 259,122.38
  5. Step 5: Solve for x
    x = 259,122.38/557.88
  6. Step 6: Final answer
    x = 464.48

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1.5x scale

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.