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Finding the Fourth Proportional to 933.10, 1,399.86 and 316.76

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Solution

The fourth proportional to 933.10, 1,399.86 and 316.76 is: 475.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.10 : 1,399.86 = 316.76 : x
  2. Step 2: Convert to fraction form
    933.10/1,399.86 = 316.76/x
  3. Step 3: Cross multiply
    933.10x = 1,399.86 × 316.76
  4. Step 4: Simplify right side
    933.10x = 443,419.65
  5. Step 5: Solve for x
    x = 443,419.65/933.10
  6. Step 6: Final answer
    x = 475.21

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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.