Home / 1,388,276.20-2,081,031.90-639,015.40

Finding the Fourth Proportional to 1,388,276.20, 2,081,031.90 and 639,015.40

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Solution

The fourth proportional to 1,388,276.20, 2,081,031.90 and 639,015.40 is: 957,886.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,276.20 : 2,081,031.90 = 639,015.40 : x
  2. Step 2: Convert to fraction form
    1,388,276.20/2,081,031.90 = 639,015.40/x
  3. Step 3: Cross multiply
    1,388,276.20x = 2,081,031.90 × 639,015.40
  4. Step 4: Simplify right side
    1,388,276.20x = 1,329,811,431,991.26
  5. Step 5: Solve for x
    x = 1,329,811,431,991.26/1,388,276.20
  6. Step 6: Final answer
    x = 957,886.79

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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.