Home / 1,286,929.41-1,930,407.90-388,379.21

Finding the Fourth Proportional to 1,286,929.41, 1,930,407.90 and 388,379.21

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Solution

The fourth proportional to 1,286,929.41, 1,930,407.90 and 388,379.21 is: 582,572.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,929.41 : 1,930,407.90 = 388,379.21 : x
  2. Step 2: Convert to fraction form
    1,286,929.41/1,930,407.90 = 388,379.21/x
  3. Step 3: Cross multiply
    1,286,929.41x = 1,930,407.90 × 388,379.21
  4. Step 4: Simplify right side
    1,286,929.41x = 749,730,285,527.72
  5. Step 5: Solve for x
    x = 749,730,285,527.72/1,286,929.41
  6. Step 6: Final answer
    x = 582,572.97

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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.