Home / 1,388,205.20-2,080,925.40-638,944.40

Finding the Fourth Proportional to 1,388,205.20, 2,080,925.40 and 638,944.40

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Solution

The fourth proportional to 1,388,205.20, 2,080,925.40 and 638,944.40 is: 957,780.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,205.20 : 2,080,925.40 = 638,944.40 : x
  2. Step 2: Convert to fraction form
    1,388,205.20/2,080,925.40 = 638,944.40/x
  3. Step 3: Cross multiply
    1,388,205.20x = 2,080,925.40 × 638,944.40
  4. Step 4: Simplify right side
    1,388,205.20x = 1,329,595,631,147.76
  5. Step 5: Solve for x
    x = 1,329,595,631,147.76/1,388,205.20
  6. Step 6: Final answer
    x = 957,780.33

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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.