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Finding the Fourth Proportional to 762.71, 1,143.51 and 300.25

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Solution

The fourth proportional to 762.71, 1,143.51 and 300.25 is: 450.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.71 : 1,143.51 = 300.25 : x
  2. Step 2: Convert to fraction form
    762.71/1,143.51 = 300.25/x
  3. Step 3: Cross multiply
    762.71x = 1,143.51 × 300.25
  4. Step 4: Simplify right side
    762.71x = 343,338.88
  5. Step 5: Solve for x
    x = 343,338.88/762.71
  6. Step 6: Final answer
    x = 450.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.