Home / 1,388,275.20-2,081,030.40-639,014.40

Finding the Fourth Proportional to 1,388,275.20, 2,081,030.40 and 639,014.40

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Solution

The fourth proportional to 1,388,275.20, 2,081,030.40 and 639,014.40 is: 957,885.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,275.20 : 2,081,030.40 = 639,014.40 : x
  2. Step 2: Convert to fraction form
    1,388,275.20/2,081,030.40 = 639,014.40/x
  3. Step 3: Cross multiply
    1,388,275.20x = 2,081,030.40 × 639,014.40
  4. Step 4: Simplify right side
    1,388,275.20x = 1,329,808,392,437.76
  5. Step 5: Solve for x
    x = 1,329,808,392,437.76/1,388,275.20
  6. Step 6: Final answer
    x = 957,885.29

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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.