Home / 1,221,136.76-1,685,269.40-677,447.55

Finding the Fourth Proportional to 1,221,136.76, 1,685,269.40 and 677,447.55

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Solution

The fourth proportional to 1,221,136.76, 1,685,269.40 and 677,447.55 is: 934,933.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,136.76 : 1,685,269.40 = 677,447.55 : x
  2. Step 2: Convert to fraction form
    1,221,136.76/1,685,269.40 = 677,447.55/x
  3. Step 3: Cross multiply
    1,221,136.76x = 1,685,269.40 × 677,447.55
  4. Step 4: Simplify right side
    1,221,136.76x = 1,141,681,622,732.73
  5. Step 5: Solve for x
    x = 1,141,681,622,732.73/1,221,136.76
  6. Step 6: Final answer
    x = 934,933.46

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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.