Home / 987,412.20-1,361,692.80-680,998.92

Finding the Fourth Proportional to 987,412.20, 1,361,692.80 and 680,998.92

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Solution

The fourth proportional to 987,412.20, 1,361,692.80 and 680,998.92 is: 939,132.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,412.20 : 1,361,692.80 = 680,998.92 : x
  2. Step 2: Convert to fraction form
    987,412.20/1,361,692.80 = 680,998.92/x
  3. Step 3: Cross multiply
    987,412.20x = 1,361,692.80 × 680,998.92
  4. Step 4: Simplify right side
    987,412.20x = 927,311,326,171.78
  5. Step 5: Solve for x
    x = 927,311,326,171.78/987,412.20
  6. Step 6: Final answer
    x = 939,132.94

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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.