Home / 1,206,990.90-1,665,658.71-663,137.96

Finding the Fourth Proportional to 1,206,990.90, 1,665,658.71 and 663,137.96

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Solution

The fourth proportional to 1,206,990.90, 1,665,658.71 and 663,137.96 is: 915,136.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206,990.90 : 1,665,658.71 = 663,137.96 : x
  2. Step 2: Convert to fraction form
    1,206,990.90/1,665,658.71 = 663,137.96/x
  3. Step 3: Cross multiply
    1,206,990.90x = 1,665,658.71 × 663,137.96
  4. Step 4: Simplify right side
    1,206,990.90x = 1,104,561,523,169.78
  5. Step 5: Solve for x
    x = 1,104,561,523,169.78/1,206,990.90
  6. Step 6: Final answer
    x = 915,136.58

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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.