Home / 1,288,731.20-1,928,504.10-1,122,081.80

Finding the Fourth Proportional to 1,288,731.20, 1,928,504.10 and 1,122,081.80

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Solution

The fourth proportional to 1,288,731.20, 1,928,504.10 and 1,122,081.80 is: 1,679,123.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,731.20 : 1,928,504.10 = 1,122,081.80 : x
  2. Step 2: Convert to fraction form
    1,288,731.20/1,928,504.10 = 1,122,081.80/x
  3. Step 3: Cross multiply
    1,288,731.20x = 1,928,504.10 × 1,122,081.80
  4. Step 4: Simplify right side
    1,288,731.20x = 2,163,939,351,835.38
  5. Step 5: Solve for x
    x = 2,163,939,351,835.38/1,288,731.20
  6. Step 6: Final answer
    x = 1,679,123.89

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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.