Home / 1,288,243.20-1,930,712.40-719,623.20

Finding the Fourth Proportional to 1,288,243.20, 1,930,712.40 and 719,623.20

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Solution

The fourth proportional to 1,288,243.20, 1,930,712.40 and 719,623.20 is: 1,078,511.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,243.20 : 1,930,712.40 = 719,623.20 : x
  2. Step 2: Convert to fraction form
    1,288,243.20/1,930,712.40 = 719,623.20/x
  3. Step 3: Cross multiply
    1,288,243.20x = 1,930,712.40 × 719,623.20
  4. Step 4: Simplify right side
    1,288,243.20x = 1,389,385,435,567.68
  5. Step 5: Solve for x
    x = 1,389,385,435,567.68/1,288,243.20
  6. Step 6: Final answer
    x = 1,078,511.76

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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.