Home / 1,221,511.09-1,685,687.28-677,646.90

Finding the Fourth Proportional to 1,221,511.09, 1,685,687.28 and 677,646.90

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Solution

The fourth proportional to 1,221,511.09, 1,685,687.28 and 677,646.90 is: 935,153.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,511.09 : 1,685,687.28 = 677,646.90 : x
  2. Step 2: Convert to fraction form
    1,221,511.09/1,685,687.28 = 677,646.90/x
  3. Step 3: Cross multiply
    1,221,511.09x = 1,685,687.28 × 677,646.90
  4. Step 4: Simplify right side
    1,221,511.09x = 1,142,300,759,661.43
  5. Step 5: Solve for x
    x = 1,142,300,759,661.43/1,221,511.09
  6. Step 6: Final answer
    x = 935,153.82

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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.