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Finding the Fourth Proportional to 1,471.28, 2,206.94 and 649.38

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Solution

The fourth proportional to 1,471.28, 2,206.94 and 649.38 is: 974.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,471.28 : 2,206.94 = 649.38 : x
  2. Step 2: Convert to fraction form
    1,471.28/2,206.94 = 649.38/x
  3. Step 3: Cross multiply
    1,471.28x = 2,206.94 × 649.38
  4. Step 4: Simplify right side
    1,471.28x = 1,433,139.45
  5. Step 5: Solve for x
    x = 1,433,139.45/1,471.28
  6. Step 6: Final answer
    x = 974.08

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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.