Home / 1,328,638.80-1,992,958.20-921,200.70

Finding the Fourth Proportional to 1,328,638.80, 1,992,958.20 and 921,200.70

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Solution

The fourth proportional to 1,328,638.80, 1,992,958.20 and 921,200.70 is: 1,381,801.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,638.80 : 1,992,958.20 = 921,200.70 : x
  2. Step 2: Convert to fraction form
    1,328,638.80/1,992,958.20 = 921,200.70/x
  3. Step 3: Cross multiply
    1,328,638.80x = 1,992,958.20 × 921,200.70
  4. Step 4: Simplify right side
    1,328,638.80x = 1,835,914,488,910.74
  5. Step 5: Solve for x
    x = 1,835,914,488,910.74/1,328,638.80
  6. Step 6: Final answer
    x = 1,381,801.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.