Home / 1,318,864.20-1,978,952.40-520,171.80

Finding the Fourth Proportional to 1,318,864.20, 1,978,952.40 and 520,171.80

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Solution

The fourth proportional to 1,318,864.20, 1,978,952.40 and 520,171.80 is: 780,516.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,864.20 : 1,978,952.40 = 520,171.80 : x
  2. Step 2: Convert to fraction form
    1,318,864.20/1,978,952.40 = 520,171.80/x
  3. Step 3: Cross multiply
    1,318,864.20x = 1,978,952.40 × 520,171.80
  4. Step 4: Simplify right side
    1,318,864.20x = 1,029,395,232,022.32
  5. Step 5: Solve for x
    x = 1,029,395,232,022.32/1,318,864.20
  6. Step 6: Final answer
    x = 780,516.47

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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.