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Finding the Fourth Proportional to 2,008.40, 3,011.56 and 709.68

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Solution

The fourth proportional to 2,008.40, 3,011.56 and 709.68 is: 1,064.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,008.40 : 3,011.56 = 709.68 : x
  2. Step 2: Convert to fraction form
    2,008.40/3,011.56 = 709.68/x
  3. Step 3: Cross multiply
    2,008.40x = 3,011.56 × 709.68
  4. Step 4: Simplify right side
    2,008.40x = 2,137,243.90
  5. Step 5: Solve for x
    x = 2,137,243.90/2,008.40
  6. Step 6: Final answer
    x = 1,064.15

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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.