Home / 1,278,011.20-1,915,388.70-679,259.20

Finding the Fourth Proportional to 1,278,011.20, 1,915,388.70 and 679,259.20

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Solution

The fourth proportional to 1,278,011.20, 1,915,388.70 and 679,259.20 is: 1,018,023.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,011.20 : 1,915,388.70 = 679,259.20 : x
  2. Step 2: Convert to fraction form
    1,278,011.20/1,915,388.70 = 679,259.20/x
  3. Step 3: Cross multiply
    1,278,011.20x = 1,915,388.70 × 679,259.20
  4. Step 4: Simplify right side
    1,278,011.20x = 1,301,045,396,051.04
  5. Step 5: Solve for x
    x = 1,301,045,396,051.04/1,278,011.20
  6. Step 6: Final answer
    x = 1,018,023.47

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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.