Home / 1,274,403.70-1,911,150.21-421,317.88

Finding the Fourth Proportional to 1,274,403.70, 1,911,150.21 and 421,317.88

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Solution

The fourth proportional to 1,274,403.70, 1,911,150.21 and 421,317.88 is: 631,826.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274,403.70 : 1,911,150.21 = 421,317.88 : x
  2. Step 2: Convert to fraction form
    1,274,403.70/1,911,150.21 = 421,317.88/x
  3. Step 3: Cross multiply
    1,274,403.70x = 1,911,150.21 × 421,317.88
  4. Step 4: Simplify right side
    1,274,403.70x = 805,201,751,640.82
  5. Step 5: Solve for x
    x = 805,201,751,640.82/1,274,403.70
  6. Step 6: Final answer
    x = 631,826.28

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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.