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Finding the Fourth Proportional to 912.68, 1,369 and 365.12

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Solution

The fourth proportional to 912.68, 1,369 and 365.12 is: 547.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.68 : 1,369 = 365.12 : x
  2. Step 2: Convert to fraction form
    912.68/1,369 = 365.12/x
  3. Step 3: Cross multiply
    912.68x = 1,369 × 365.12
  4. Step 4: Simplify right side
    912.68x = 499,849.28
  5. Step 5: Solve for x
    x = 499,849.28/912.68
  6. Step 6: Final answer
    x = 547.67

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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.