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Finding the Fourth Proportional to 762.16, 1,143.38 and 299.93

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Solution

The fourth proportional to 762.16, 1,143.38 and 299.93 is: 449.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.16 : 1,143.38 = 299.93 : x
  2. Step 2: Convert to fraction form
    762.16/1,143.38 = 299.93/x
  3. Step 3: Cross multiply
    762.16x = 1,143.38 × 299.93
  4. Step 4: Simplify right side
    762.16x = 342,928.55
  5. Step 5: Solve for x
    x = 342,928.55/762.16
  6. Step 6: Final answer
    x = 449.94

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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.