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Finding the Fourth Proportional to 552.78, 762.79 and 319.86

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Solution

The fourth proportional to 552.78, 762.79 and 319.86 is: 441.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.78 : 762.79 = 319.86 : x
  2. Step 2: Convert to fraction form
    552.78/762.79 = 319.86/x
  3. Step 3: Cross multiply
    552.78x = 762.79 × 319.86
  4. Step 4: Simplify right side
    552.78x = 243,986.01
  5. Step 5: Solve for x
    x = 243,986.01/552.78
  6. Step 6: Final answer
    x = 441.38

Related Problems

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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.