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Finding the Fourth Proportional to 1,471.86, 2,209.01 and 606.78

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Solution

The fourth proportional to 1,471.86, 2,209.01 and 606.78 is: 910.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,471.86 : 2,209.01 = 606.78 : x
  2. Step 2: Convert to fraction form
    1,471.86/2,209.01 = 606.78/x
  3. Step 3: Cross multiply
    1,471.86x = 2,209.01 × 606.78
  4. Step 4: Simplify right side
    1,471.86x = 1,340,380.05
  5. Step 5: Solve for x
    x = 1,340,380.05/1,471.86
  6. Step 6: Final answer
    x = 910.67

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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.