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Finding the Fourth Proportional to 2,009.68, 3,013.70 and 776.40

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Solution

The fourth proportional to 2,009.68, 3,013.70 and 776.40 is: 1,164.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,009.68 : 3,013.70 = 776.40 : x
  2. Step 2: Convert to fraction form
    2,009.68/3,013.70 = 776.40/x
  3. Step 3: Cross multiply
    2,009.68x = 3,013.70 × 776.40
  4. Step 4: Simplify right side
    2,009.68x = 2,339,836.68
  5. Step 5: Solve for x
    x = 2,339,836.68/2,009.68
  6. Step 6: Final answer
    x = 1,164.28

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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.