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Finding the Fourth Proportional to 552.69, 762.81 and 319.81

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Solution

The fourth proportional to 552.69, 762.81 and 319.81 is: 441.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.69 : 762.81 = 319.81 : x
  2. Step 2: Convert to fraction form
    552.69/762.81 = 319.81/x
  3. Step 3: Cross multiply
    552.69x = 762.81 × 319.81
  4. Step 4: Simplify right side
    552.69x = 243,954.27
  5. Step 5: Solve for x
    x = 243,954.27/552.69
  6. Step 6: Final answer
    x = 441.39

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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.