Home / 1,278,005.20-1,915,379.70-679,253.20

Finding the Fourth Proportional to 1,278,005.20, 1,915,379.70 and 679,253.20

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Solution

The fourth proportional to 1,278,005.20, 1,915,379.70 and 679,253.20 is: 1,018,014.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,005.20 : 1,915,379.70 = 679,253.20 : x
  2. Step 2: Convert to fraction form
    1,278,005.20/1,915,379.70 = 679,253.20/x
  3. Step 3: Cross multiply
    1,278,005.20x = 1,915,379.70 × 679,253.20
  4. Step 4: Simplify right side
    1,278,005.20x = 1,301,027,790,440.04
  5. Step 5: Solve for x
    x = 1,301,027,790,440.04/1,278,005.20
  6. Step 6: Final answer
    x = 1,018,014.47

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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.