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Finding the Fourth Proportional to 1,872.45, 2,808.74 and 776.62

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Solution

The fourth proportional to 1,872.45, 2,808.74 and 776.62 is: 1,164.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.45 : 2,808.74 = 776.62 : x
  2. Step 2: Convert to fraction form
    1,872.45/2,808.74 = 776.62/x
  3. Step 3: Cross multiply
    1,872.45x = 2,808.74 × 776.62
  4. Step 4: Simplify right side
    1,872.45x = 2,181,329.11
  5. Step 5: Solve for x
    x = 2,181,329.11/1,872.45
  6. Step 6: Final answer
    x = 1,164.96

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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.