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Finding the Fourth Proportional to 1,433.81, 2,147.15 and 912.28

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Solution

The fourth proportional to 1,433.81, 2,147.15 and 912.28 is: 1,366.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433.81 : 2,147.15 = 912.28 : x
  2. Step 2: Convert to fraction form
    1,433.81/2,147.15 = 912.28/x
  3. Step 3: Cross multiply
    1,433.81x = 2,147.15 × 912.28
  4. Step 4: Simplify right side
    1,433.81x = 1,958,793.24
  5. Step 5: Solve for x
    x = 1,958,793.24/1,433.81
  6. Step 6: Final answer
    x = 1,366.14

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1.5x scale

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.