Home / 1,380,909.53-2,071,315.31-421,326.38

Finding the Fourth Proportional to 1,380,909.53, 2,071,315.31 and 421,326.38

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Solution

The fourth proportional to 1,380,909.53, 2,071,315.31 and 421,326.38 is: 631,974.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,909.53 : 2,071,315.31 = 421,326.38 : x
  2. Step 2: Convert to fraction form
    1,380,909.53/2,071,315.31 = 421,326.38/x
  3. Step 3: Cross multiply
    1,380,909.53x = 2,071,315.31 × 421,326.38
  4. Step 4: Simplify right side
    1,380,909.53x = 872,699,781,400.88
  5. Step 5: Solve for x
    x = 872,699,781,400.88/1,380,909.53
  6. Step 6: Final answer
    x = 631,974.62

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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.