Home / 1,678,135.27-2,515,836.42-780,143.35

Finding the Fourth Proportional to 1,678,135.27, 2,515,836.42 and 780,143.35

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Solution

The fourth proportional to 1,678,135.27, 2,515,836.42 and 780,143.35 is: 1,169,579.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678,135.27 : 2,515,836.42 = 780,143.35 : x
  2. Step 2: Convert to fraction form
    1,678,135.27/2,515,836.42 = 780,143.35/x
  3. Step 3: Cross multiply
    1,678,135.27x = 2,515,836.42 × 780,143.35
  4. Step 4: Simplify right side
    1,678,135.27x = 1,962,713,052,750.81
  5. Step 5: Solve for x
    x = 1,962,713,052,750.81/1,678,135.27
  6. Step 6: Final answer
    x = 1,169,579.76

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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.