Home / 1,221,198.47-1,685,455.61-677,509.40

Finding the Fourth Proportional to 1,221,198.47, 1,685,455.61 and 677,509.40

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Solution

The fourth proportional to 1,221,198.47, 1,685,455.61 and 677,509.40 is: 935,074.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,198.47 : 1,685,455.61 = 677,509.40 : x
  2. Step 2: Convert to fraction form
    1,221,198.47/1,685,455.61 = 677,509.40/x
  3. Step 3: Cross multiply
    1,221,198.47x = 1,685,455.61 × 677,509.40
  4. Step 4: Simplify right side
    1,221,198.47x = 1,141,912,019,883.83
  5. Step 5: Solve for x
    x = 1,141,912,019,883.83/1,221,198.47
  6. Step 6: Final answer
    x = 935,074.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.