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Finding the Fourth Proportional to 912.29, 1,369.08 and 364.59

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Solution

The fourth proportional to 912.29, 1,369.08 and 364.59 is: 547.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.29 : 1,369.08 = 364.59 : x
  2. Step 2: Convert to fraction form
    912.29/1,369.08 = 364.59/x
  3. Step 3: Cross multiply
    912.29x = 1,369.08 × 364.59
  4. Step 4: Simplify right side
    912.29x = 499,155.70
  5. Step 5: Solve for x
    x = 499,155.70/912.29
  6. Step 6: Final answer
    x = 547.15

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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.